ADJ. happy | uncanny | unhappy He had the unhappy knack of making enemies in the party.
VERB + KNACK have | acquire, develop, get Once you get the knack, it's easy. | lose I don't cook much these days and I think I may have lost the knack.
PREP. ~ for a woman with a knack for handling horses | ~ of He has the knack of scoring goals just when they are most needed. | ~ to Making omelettes isn't difficult, but there's a knack to it.