engrossed 英語で:

1. giving all your attention to something

2. very busy

英語 "という言葉engrossed"（very busy）集合で発生します。

lost the very

3. so interested in something that you do not think of anything else

英語 "という言葉engrossed"（so interested in something that you do not think of anything else）集合で発生します。

reading&lexis unit 2