嘆く
なげく · nageku · JLPT N1 · verb-godan
to lament
💨 Sounds like nag-a-koo: a nagging, drawn-out sigh
The kanji 嘆 has the mouth radical 口, fitting a sound made by breath released from the mouth. Use 嘆く for sighing over a loss or misfortune, as in lamenting.