fell 1 
(fĕl)
(fĕl)tr.v. felled, fell·ing, fells
1.
a. To cause to fall by striking; cut or knock down: fell a tree; fell an opponent in boxing.
b. To kill: was felled by an assassin's bullet.
2. To sew or finish (a seam) with the raw edges flattened, turned under, and stitched down.
n.
1. The timber cut down in one season.
2. A felled seam.
[Middle English fellen, from Old English fellan, fyllan.]
fella·ble adj.