billhook, pruning hook, sickle (agricultural implement often with a curved or hooked end to the blade used for pruning or cutting thick, woody plants)

coarsely, roughly, carelessly

snake

feminine plural of serpentin

rattlesnake

sea serpent / a long-discussed subject with no concrete reality

coral snake

second-person singular present indicative/subjunctive of serpenter

Serpens (constellation)

(figuratively) it's a vicious circle