[なきゃいけない(無きゃいけない)(P);なくてはいけない(無くてはいけない)(P), nakyaikenai ( naki yaikenai )(P); nakutehaikenai ( naku tehaikenai )(P)](exp) (1) (uk) cannot do without something; indispensable; absolutely necessary; (2) (after negative base of verb) have to do; (P)[Add to Longdo]