Capable refers to ability or potential. Competent refers to the skill and judgment to do something well and reliably.

The word lesbian began as a place name linked to Lesbos and the poet Sappho, then grew into a term for women who love women.

“Come up to scratch” began as a boxing term about stepping to a line. Now it means meeting the expected standard.

Possible means it can happen or exist. Feasible means it can realistically be done with the resources, time, or conditions you have.