to stick (to something)

conform to or follow rules exactly

to be a friend to (especially a person who needs help)

make social acquaintance; support

to speak favourably of (a person, thing); say that one thinks (something) is good (for a purpose) or that (a person) is suitable (for a post etc)

advise, approve

to keep (a person, thing) from falling or sinking; to keep (a person, health etc) strong; to keep (something) active, existing etc for a long period

keep up, maintain

to support or approve of (a person's behaviour, action etc); to confirm (a decision, a verdict) as correct

maintain, support