rock >> /rɑk/
Definition: [noun] The solid mineral material forming part of the surface of the earth and other similar planets, exposed on the surface or underlying the soil or oceans.
Example: the beds of rock are slightly tilted
Definition: [noun] A large piece of rock which has become detached from a cliff or mountain; a boulder.
Example: the stream flowed through a jumble of rocks
Definition: [noun] Used to refer to someone or something that is extremely strong, reliable, or hard.
Example: imagining himself as the last rock of civilization being swept over by a wave of barbarism
Definition: [noun] Money.