Vocabulary consisting only from characters you are able to read
細かい
komakai
(1)small/ (2)fine/minute/ (3)minor/trivial/ (4)sensitive/attentive/(P) adj, jlpt3, jlpt4, leda1
努める
tsutomeru
to endeavor (endeavour), to try, to strive, to make an effort, to exert oneself, to be diligentichidan, verb, vtrans