English Lessons

If you want to grow your English vocabulary quickly, word formation is honestly the smartest place to put your energy. Instead of learning thousands of separate words, you learn a handful of patterns that let you build whole families from a single root. Take the verb decide: once you know it, you are only a small step away from decision, decisive, decisively, indecision and indecisive. That is six words for the price of one.

At B2 level, examiners actively test this. The Cambridge First (FCE) Use of English paper has a whole section dedicated to word formation, and IELTS Writing examiners reward candidates who can move comfortably between nouns, verbs and adjectives. So in this lesson we will go through the most useful suffixes and prefixes, look at how they change meaning and word class, and finish with a short transformation quiz in the exam style. Grab a notebook — you will want to jot some of these down.

Common noun suffixes

Noun suffixes turn verbs and adjectives into the names of things, ideas, people or qualities. Here are the six you really need.

  • -tion / -sion — turns verbs into abstract nouns: educate → education, decide → decision, discuss → discussion, inform → information.
  • -ment — also from verbs, often about a result or a state: develop → development, achieve → achievement, improve → improvement, argue → argument (mind the missing e).
  • -ness — turns adjectives into nouns describing a quality: happy → happiness, kind → kindness, weak → weakness, polite → politeness.
  • -ity — also from adjectives, with a slightly more formal feel: able → ability, active → activity, creative → creativity, possible → possibility.
  • -er / -or — the person or thing that does an action: teach → teacher, write → writer, act → actor, translate → translator.
  • -ist — a person with a particular job, belief or skill: art → artist, science → scientist, journal → journalist, tour → tourist.

Quick tip: when you learn a new verb, get into the habit of asking yourself, what is the noun? It takes ten seconds and doubles your active vocabulary.

Common adjective suffixes

Adjective suffixes are how we describe the qualities of things. Six to know:

  • -able / -ible — meaning ‘able to be’: enjoy → enjoyable, rely → reliable, respect → respectable, access → accessible.
  • -ful — ‘full of’: care → careful, use → useful, beauty → beautiful, power → powerful.
  • -less — the opposite, ‘without’: care → careless, use → useless, hope → hopeless, home → homeless.
  • -ous — ‘having the quality of’: danger → dangerous, fame → famous, ambition → ambitious, mystery → mysterious.
  • -ive — ‘tending to’: create → creative, attract → attractive, act → active, impress → impressive.
  • -al — ‘relating to’: nature → natural, culture → cultural, music → musical, profession → professional.

Notice how -ful and -less are a natural pair: a useful tip is the opposite of a useless one. Learning them together saves time.

Common verb suffixes

Verb suffixes are fewer in number but extremely productive. They usually take a noun or adjective and turn it into an action.

  • -ise / -ize — ‘to make or become’. In British English we generally prefer -ise: modern → modernise, real → realise, organ → organise, apology → apologise.
  • -ify — also ‘to make’, often with a small spelling change: simple → simplify, clear → clarify, pure → purify, terror → terrify.
  • -en — ‘to make more’, attached to short adjectives: wide → widen, short → shorten, strong → strengthen, deep → deepen.

A common B2 mistake is to write the noun where the verb is needed: “We need to organisation the files” instead of “We need to organise the files.” Spotting the suffix tells you instantly which word class you are dealing with.

Negative prefixes — choosing the right one

This is where a lot of B2 learners hesitate. There are five main negative prefixes, and the choice often depends on the first letter of the root word.

  • un- is the all-purpose default with adjectives and past participles: happy → unhappy, fair → unfair, known → unknown, expected → unexpected.
  • in- often goes with words of Latin origin: correct → incorrect, visible → invisible, complete → incomplete. It changes shape to match the next sound: im- before p, b, m (impossible, imbalance, immature); il- before l (illegal, illogical); ir- before r (irregular, irresponsible).
  • dis- often suggests a reversal or absence: agree → disagree, appear → disappear, honest → dishonest.
  • mis- means ‘wrongly’ or ‘badly’: understand → misunderstand, spell → misspell, behave → misbehave.
  • non- is more neutral — simply ‘not’, with no negative judgement: non-smoker, non-fiction, non-essential.

If you are unsure, your dictionary is your friend. There is rarely a logical rule strong enough to predict the prefix every time, so good learners record the negative form alongside the original word from day one.

Other useful prefixes

Beyond negation, prefixes can shift meaning in time, degree or direction. These five appear constantly:

  • re- — ‘again’ or ‘back’: write → rewrite, build → rebuild, turn → return, think → rethink.
  • over- — ‘too much’: cook → overcook, sleep → oversleep, charge → overcharge, confident → overconfident.
  • under- — ‘not enough’ or ‘below’: cooked → undercooked, estimate → underestimate, paid → underpaid.
  • pre- — ‘before’: view → preview, pay → prepay, historic → prehistoric, book → prebook.
  • post- — ‘after’: graduate → postgraduate, war → post-war, match → post-match.

Notice how naturally these stack with the suffixes from earlier sections. Reorganisation, overdevelopment, preselection — you can build long, precise words just by combining the bricks you already know.

Mini exam-style transformation quiz

Now put the theory to work. Complete each second sentence so it means the same as the first, using the word given. Use between two and five words, including the word given. This is the Cambridge First (FCE) format, and it is excellent practice even if you are not sitting the exam.

  1. Her decision surprised everyone in the office. SURPRISING
    Everyone in the office found __________ .
  2. It is impossible to read his handwriting. READ
    His handwriting is __________ .
  3. The teacher explained the rule again. RE-
    The teacher __________ the rule.
  4. Tom does not behave well in class. MISBEHAVES
    Tom __________ in class.
  5. The instructions were not clear. UNCLEAR
    The instructions __________ .
  6. She is very creative. CREATIVITY
    She has a lot of __________ .
  7. You paid too much for that jumper. OVERPAID
    You __________ for that jumper.
  8. It is not possible to predict the result. UNPREDICTABLE
    The result __________ .
  9. He hopes to be successful one day. SUCCESS
    He hopes to __________ one day.
  10. The film was not interesting at all. UNINTERESTING
    The film __________ at all.

Try them before you scroll. Aim for accuracy first, speed second.

Answers and next steps

  1. her decision surprising
  2. impossible to read
  3. re-explained
  4. misbehaves
  5. were unclear
  6. creativity
  7. overpaid
  8. is unpredictable
  9. have / achieve success
  10. was uninteresting

How did you get on? If you scored seven or more, your word-formation instincts are already strong — keep stretching by reading widely and noting word families as you meet them. If you found it tricky, do not worry; this is exactly the kind of skill that improves fastest with a teacher giving you targeted feedback.

If you would like to practise word formation (and everything else) in small classes with experienced British and Maltese teachers, come and study with us in Malta. Request a quick quotation here and our team will put together a course package built around your level and goals.

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