guarantee verb

1 promise to do sth/promise sth will happen

ADV. absolutely I can absolutely guarantee that you will enjoy the show. | personally I personally guarantee total and immediate support in all measures undertaken.

VERB + GUARANTEE be able to, can

2 give a written promise about the quality of sth

PHRASES be fully guaranteed All our electrical goods are fully guaranteed.

3 make sth certain to happen

ADV. absolutely | almost, practically, virtually | effectively The complicated electoral system effectively guarantees the president's re-election. | automatically The process of training and qualification does not automatically guarantee you a job. | by no means, not necessarily The outcome is by no means guaranteed.