Basic Suffixes and Word Forms

What are Basic Suffixes and Word Forms?

Suffixes are letters or groups of letters added to the end of a word to change its meaning, grammatical function, or both. Understanding basic suffixes is crucial for expanding your vocabulary and correctly identifying a word's part of speech (e.g., noun, verb, adjective, adverb). This allows you to use words accurately in sentences and comprehend complex texts.

1. Suffixes that form Nouns

Many suffixes can turn a verb or an adjective into a noun.

a. Suffixes indicating a state, quality, or condition:

• -ness (from adjectives):
  • happy → happiness** (the state of being happy)
  • kind → kindness** (the quality of being kind)
  • dark → darkness** (the state of being dark)
• -ment (from verbs):
  • develop → development** (the process or result of developing)
  • agree → agreement** (the act or result of agreeing)
  • achieve → achievement** (the result of achieving)
• -tion / -sion / -ation / -ition (from verbs):
  • inform → information** (the act of informing)
  • decide → decision** (the act of deciding)
  • organize → organization** (the act or result of organizing)
  • compete → competition** (the act of competing)
• -ity / -ty (from adjectives):
  • active → activity** (the state of being active)
  • real → reality** (the state of being real)
  • certain → certainty** (the state of being certain)

b. Suffixes indicating a person or agent:

• -er / -or (from verbs):
  • teach → teacher** (a person who teaches)
  • act → actor** (a person who acts)
  • drive → driver** (a person who drives)
• -ist (often for professions or beliefs):
  • art → artist** (a person who creates art)
  • science → scientist** (a person who studies science)
  • social → socialist** (a person who believes in socialism)

2. Suffixes that form Adjectives

These suffixes can turn nouns or verbs into adjectives.

• -able / -ible (indicating capability or possibility):
  • read → readable** (can be read)
  • access → accessible** (can be accessed)
  • comfort → comfortable** (providing comfort)
• -ful (indicating 'full of' or 'having'):
  • beauty → beautiful** (full of beauty)
  • care → careful** (having care)
  • hope → hopeful** (having hope)
• -less (indicating 'without'):
  • care → careless** (without care)
  • hope → hopeless** (without hope)
  • end → endless** (without end)
• -ous (indicating 'full of' or 'characterized by'):
  • danger → dangerous** (full of danger)
  • fame → famous** (characterized by fame)
  • nerve → nervous** (characterized by nerves)
• -y (indicating 'like' or 'characterized by'):
  • sun → sunny** (like the sun)
  • rain → rainy** (characterized by rain)
  • dirt → dirty** (characterized by dirt)

3. Suffixes that form Adverbs

The most common suffix for forming adverbs from adjectives is -ly.

• -ly (from adjectives):
  • quick → quickly** (in a quick manner)
  • careful → carefully** (in a careful manner)
  • easy → easily** (in an easy manner)

4. Suffixes that form Verbs

While less common than other types, some suffixes can form verbs.

• -en (often to make or become):
  • dark (adj) → darken** (to make dark)
  • short (adj) → shorten** (to make short)
  • strength (noun) → strengthen** (to make strong)
• -ize / -ise (to make, cause to be, or become):
  • standard (noun) → standardize** (to make standard)
  • modern (adj) → modernize** (to make modern)
  • real (adj) → realise** (to become aware of)

Common Errors and How to Fix Them

Summary

💡 The key takeaway: Mastering basic suffixes helps you not only understand new words but also create grammatically correct sentences by choosing the right word form. Pay attention to the part of speech a suffix typically creates.