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prop

1 verb
     
prop1 past tense and past participle propped, present participle propping [transitive always + adverb/preposition]
to support something by leaning it against something, or by putting something else under, next to, or behind it
prop something against/on something
He propped his bike against a tree.
Can we prop the window open with something?

prop something ↔ up

phrasal verb
1 to prevent something from falling by putting something against it or under it:
The builders are trying to prop up the crumbling walls of the church.
prop something ↔ up against
paintings propped up against the wall
2 to help an economy, industry, or government so that it can continue to exist, especially by giving money:
The government introduced measures to prop up the stock market.
3

prop yourself up

to hold your body up by leaning against something
prop yourself up on/against/with
She propped herself up on one elbow.

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