本腰ほんごしれる
hongoshio ireru

Ichidan Verb
Idiomatic Expression

1. to set about in earnest; to make a strenuous effort; to put one's back into (doing)

おれあわててさがもの本腰ほんごしはじめた。
orewa awatete sagashimononi hongoshio irehajimeta.
I hurriedly started searching in earnest.
Other forms: