根負 こんま
kommake

Noun
Suru Verb

1. being beaten by one's opponent's persistence; being outlasted; running out of patience; giving in; succumbing (to)

Intransitive
ホントしつこいなぁ、しのぶさん。なんか根負 こんまけしそう。
honto shitsukoinā shinobusan. nankakommake shisō.
Shinobu is really persistent. It seems that I am beaten.