whose
From Longman Dictionary of Contemporary Englishwhosewhose /huːz/ ●●● S2 W1 determiner, pronoun 1 XXused to ask which person or people a particular thing belongs to Whose is this? Whose keys are those?2 XXused to show the relationship between a person or thing and something that belongs to that person or thing That’s the man whose house has burned down. Solar energy is an idea whose time has come.3 used to give additional information about a person or thing Jurors, whose identities will be kept secret, will be paid $40 a day.Origin whose Old English hwæs, from hwa; → WHO