牢靠妥當

reliable / solid and dependable

to lean against or on / to stand by the side of / to come near to / to depend on / to trust / to fuck (vulgar) / traditional military costume drama where the performers wear armor (old)

firm / sturdy / fold (for animals) / sacrifice / prison

suitable / adequate / ready / settled

firm and solid / robust / reliable

appropriate / proper / ready

to be / to act as / manage / withstand / when / during / ought / should / match equally / equal / same / obstruct / just at (a time or place) / on the spot / right / just at

at or in the very same... / suitable / adequate / fitting / proper / to replace / to regard as / to think / to pawn / (coll.) to fail (a student)