blend in

US /blend ɪn/
UK /blend ɪn/
"blend in" picture
1.

溶け込む, なじむ

to look similar to the other people or things around you so that you are not easily noticed

:
He tried to blend in with the local crowd.
彼は地元の群衆に溶け込もうとした。
The chameleon can change its color to blend in with its surroundings.
カメレオンは周囲に溶け込むために色を変えることができる。