engrossed
engross
+
-ed
https://gyazo.com/4e14c9b5fd5f2c783f4bf74126a10d4e
adjective
predicative
having
all
one's
attention
or
interest
absorbed
by someone or something:
〖be ～〗 «…に» 夢中で, 熱中［没頭］して «in, with»
e.g.
they seemed to be engrossed in conversation.