出典:Wiktionary
Attested since the 1610s, from the earlier form trouzes (attested since the 1580s), extended from trouse (1570s), with plural ending typical of things in pairs, from Middle Irish triubhas (“close-fitting shorts”), of uncertain origin. The unexplained intrusive second -r- is perhaps due to the influence of drawers.[1]
trousers pl (複数形 only, attributive trouser)
ダブダブのズボン
creased trousers
creased trousers
flared trousers
a pair of trousers
a pair of trousers
スボンをはく
to wear trousers
riding-trousers
narrow trousers
pajama trousers
wide trousers
tight-fitting trousers
シャツの
uncreased trousers
「trousers」は名詞「trouser」の複数形です