engrossed
adjective uk/ɪnˈɡrəʊst/ us/ɪnˈɡroʊst/
C2 全神贯注的；专心致志的
giving all your attention to something
She was so engrossed by/in the book that she forgot the cookies in the oven. 她看书看得太入迷了，以至于忘了烤箱中正烤着饼干。
They were so engrossed in/with what they were doing that they didn't hear me come in. 他们专心致志地做着手头的事，连我进去都没有听见。
Synonym: absorbed