慌てて着替えなくてもいいよ。急いでいるわけじゃないから。

to become confused (disconcerted, disorganized, disorganised); to be flustered; to panic; to be in a hurry; to rush

to change one's clothes

too; also; in addition; as well; (not) either (in a negative sentence); both A and B; A as well as B; neither A nor B (in a negative sentence); even; as much as; as many as; as far as; as long as; no less than; no fewer than; even if; even though; although; in spite of; further; more; again; another; the other

good; excellent; fine; nice; pleasant; agreeable; sufficient (can be used to turn down an offer); ready; prepared; profitable (e.g. deal, business offer, etc.); beneficial; OK

indicates certainty, emphasis, contempt, request, etc.; used when calling out to someone; used to catch one's breath or get someone's attention; yo!

to hurry; to rush; to hasten; to make something happen sooner

conclusion from reasoning, judgement or calculation based on something read or heard; reason; cause; meaning; circumstances; situation

then; well; so; well then; combination of 'de' and 'wa' particles; plain copula

from (e.g. time, place, numerical quantity); since; from (originator); by; because; since; out of (constituent, part); through (e.g. window, vestibule); after; since