to enter, go into, get into a place or a thing / to join a group or organization / to be contained (in), to be included (in) / to be a member of a group, set, category

(idiomatic) to avoid being seen; to be clandestine

a house

house of something, place where some business is conducted / person who does that thing

a house / one's house

a house

an expert, professional, performer

representing relationship to a family

home / house / family

everything