馴々しい

なれなれしい · narenareshii · JLPT N1 · i-adj

familiar

馴れ (get used to) + 々 repeat mark = doubled familiarity, i.e. overly familiar

The 々 is a repeat mark that doubles 馴れ (to become familiar). The doubling signals going too far, like calling a stranger 'buddy' on first meeting.

More Japanese words · How Japanese works