打うち解とけにくい

i-adjective

hard to open up to; difficult to get close to

Describes a person or atmosphere that makes it hard for others to relax and become friendly. Often used for someone reserved, shy, or unapproachable.

• 彼かれは最さい初しょは打うち解とけにくいけど、慣なれると面おも白しろい人ひとだよ。

  He's hard to open up to at first, but once you get used to him he's a fun guy.

• あのクラスはみんな打うち解とけにくい雰ふん囲い気きだった。

  That class had an atmosphere where it was hard for everyone to relax and get friendly.