phrase – n. a group of two or more words that express a single idea, but do not usually form a complete sentence
irregular – n. grammar not following the normal rules by which word forms (such as the past tenses of verbs) are usually created
idiomatic – adj. an expression that is an idiom – it cannot be understood from the meanings of its separate words because it has a separate meaning of its own
bear in mind – expression. to remember or take into consideration
style – n. a way of doing something; an appearance or design
bicycle – n. a vehicle with two wheels; an exercise machine that looks like such a vehicle
character – n. personality
grammar – n. the study of words, what they do and their relations in sentences