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)
lit. the mountain dweller lives off the mountain, the shore dweller lives off the sea (idiom) / fig. to make the best use of local resources / to exploit one's position to advance oneself / to find one's niche / to live off the land