馴染(なじ)む

to become familiar with; to fit in

馴染(なじ)み

familiarity; acquaintance

馴(な)れ馴(な)れしい

overly familiar; presumptuous

馴(な)れ合(あ)い

collusion; improper cooperation

馴致(じゅんち)

acclimatization; taming

馴(な)れ初(そ)め

how a relationship began

馴(な)れ親

彼女(かのじょ)は新(あたら)しい環境(かんきょう)にもすぐに馴染(なじ)む。

She quickly adapts even to new environments.

初対面(しょたいめん)なのに、彼(かれ)の馴(な)れ馴(な)れしい態度(たいど)には戸惑(とまど)った。

Although it was our first meeting, I was bewildered by his overly familiar attitude.