caster
Translation
caster, castor, thrower
Examples
The office chair has five casters.
The office chair has five casters.
Grammar Patterns
a caster on ((sth.)) a wheel attached to something One caster on my suitcase is broken.
Similar Words
Synonyms: wheel, roller, pivot.
Etymology
From the verb 'cast' + the agent suffix '-er'. It's something that 'casts' or allows something to be 'cast' (pushed/thrown).
Memory Tips
Think of an office chair. You can 'cast' it across the room because it has little wheels called casters.