fell, fells, felling, felled, to cut down, cut down
Mnemonic
[f-] Frodo is in [2] inside the [-a] auditorium, invisible, trying to take down 亻 Slenderman who is on the stage, standing tall like a tree. He gets a 戈 halberd and slashes at his feet (while himself invisible), 伐 felling the skinny giant, who crashes onto the stage like a 伐 felled tree.