ケンさん、君は本気かい。

けんさん、君は本気かい。

Are you on the level, Ken?

ケンさん、君(きみ)は本気(ほんき)かい。

Ken san, kimi wa honki kai.

腱 (けん)

tendon

さん (さん)

Mr.; Mrs.; Miss; Ms.; -san; makes words more polite (usu. in fixed expressions)

君 (きみ)

you; buddy; pal; monarch; ruler; sovereign; (one's) master

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

本気 (ほんき)

seriousness; truth; sanctity

かい (かい、かえ)

marks yes-no question

Readings: クン、きみ、 -ぎみ

Meanings: mister, you, ruler, male name suffix

Readings: ホン、もと

Meanings: book, present, main, origin, true, real, counter for long cylindrical things

Readings: キ、ケ、いき

Meanings: spirit, mind, air, atmosphere, mood