irretrievably
US /ˌɪr.əˈtriː.və.bli/
UK /ˌɪr.ɪˈtriː.və.bli/
副詞
取り返しのつかないほど
in a way that is not possible to correct or is impossible to return to a previously existing situation or condition:
例:
•
irretrievably damaged/lost