idiom An expression whose meaning cannot be determined from its parts but must be learned (call off for “cancel”).
Read and listen carefully to get a sense of standard idioms, especially the ones that consist of small words, such as prepositions, and verb forms.
Idiomatic two-and three-word verbs (put down, set up) and combinations of verbs or adjectives and prepositions (look for, afraid of ) can be especially troublesome for writers whose first language is not English. See T2-b.