which
[代]【疑問代名詞】1 (定まった選択肢の中から)どれ,どちらWhich of these do you want?これらのうちどれが欲しいですかWhich do you prefer, cla...
whichever
[代]1 〔関係代名詞〕…するどれ[どちら]でも(any one that)Choose whichever you want [like].どれ[どちら]でもほしいものを選びなさい2 〔譲歩節...
whichsoever
[代]形((古))=whichever
which is which
どれがどれやら,だれがだれやらI no longer know which is which.もうどっちがどっちだかわからない
Which came first, the chicken or the egg?
((略式))ニワトリが先か卵が先か,どちらが原因でどちらが結果か