やけに
yakeni

Adverb

1. awfully; frightfully; desperately; violently; unduly; extremely

Colloquial
Related to 自棄
もうやめなさい。今日 きょうはやけにふざけているんだから。
mō yamenasai. kyōwa yakeni fuzakete iru ndakara.
Stop it. You're being ridiculous.