keen
[形] 熱心な
同義語・類似語
acute, bang-up, bully, corking, cracking, cutting, dandy, discriminating, exquisite, great, groovy, incisive, knifelike, lament, lancinate, lancinating, neat, nifty, not_bad, peachy, penetrating, penetrative, piercing, sharp, slap-up, smashing, stabbing, swell,