- 未必尽然 wèibìjìnrán not necessarily sonot necessarily all like this; not always the case
- 小时了了，大未必佳 xiǎoshíliǎoliǎodàwèibìjiā precociousness does not guarantee future successA proverb meaning that being bright and clever at an early age does not necessarily lead to achievement when growing up.
- 未必见得 wèibìjiànde not necessarilynot necessarily; it is not certain to be the case
- 空穴来风未必无因 kōngxuéláifēngwèibìwúyīn no smoke without fire(idiom) a wind does not come from an empty cave without reason; there is no smoke without fire
