noun

1. a rigid support, as a beam, stake, or pole, placed under or against a structure or part
2. a person or thing that gives support or aid to a person, institution, etc.

Etymology: ME proppe < MDu, prop, ? akin to Ger pfropfen, stopper

transitive verb propped, propping prop′·ping

1. to support, hold up, or hold in place with or as with a prop: often with up
2. to place or lean (something) against a support
3. to sustain or bolster

noun

noun

1. proper(ly)
2. property
3. proposition
4. proprietor