Correct

入室

/ rù shì / 
Strokes

Example

As a Verb

enter sb's house

1
Rùshì
入室
xíngqiè
行窃

burgle; burglarize

As a Verb

gain mastery of

2
Rùshìdìzǐ
入室弟子

well-accomplished student; pupil who has learned much from the master