godan ~る verb / transitive:

• to cut; to cut through; to perform (surgery)
• to sever (connections, ties) ➜ 縁を切る
• to turn off (e.g. the light)
• to terminate (e.g. a conversation); to hang up (the phone); to disconnect ➜ 電話を切る
• to punch (a ticket); to tear off (a stub)
• to open (something sealed)
• to start
• to set (a limit); to do (something) in less or within a certain time; to issue (stamps, vouchers, etc.)
• to reduce; to decrease; to discount ➜ 値切る
• to shake off (water, etc.); to let drip-dry; to let drain
• to cross; to traverse
• to criticize sharply
• to act decisively; to do (something noticeable); to go first; to make (certain facial expressions, in kabuki)
• to turn (vehicle, steering wheel, etc.)
• to curl (a ball); to bend; to cut
• to shuffle (cards)
• to discard a tile - Mahjong term
• to dismiss; to sack; to let go; to expulse; to excommunicate
• to dig (a groove); to cut (a stencil, on a mimeograph)
• to trump ➜ 切り札
• to cut (the connection between two groups) (in go)
• to start a fire (with wood-wood friction or by striking a metal against stone) - also written as 鑽る
• to draw (a shape) in the air (with a sword, etc.)

auxiliary verb / godan ~る verb:

• to finish; to complete - after the -masu stem of a verb ➜ 疲れきる