can opener

: know, understand

: to be able to do, make, or accomplish

: to have knowledge or skill

: a usually cylindrical receptacle:

: a vessel for holding liquids

: a usually metal typically cylindrical receptacle usually with an open top, often with a removable cover, and sometimes with a spout or side handles (as for holding liquid or trash)

: to put in a can : preserve by sealing in airtight cans or jars

: to hit (a golf shot) into the cup

: to hit (a shot) in basketball

: one that opens : such as

: cards of sufficient value for a player to open the betting in a poker game

: the first item, contest, or event of a series