to drop off to sleep, to lose consciousness / to be keen (on something), to fancy, to be fascinated (by), to be crazy (about) / to be lost, to lose one's way

Mekong

(obsolete) retarded; mentally challenged

to be superstitious / to have blind faith in

(medicine) to anesthetize / (medicine, specifically) to apply general anesthesia

to be passionate about; obsessed with / to crave

to be infatuated; to be enchanted

(medicine) preanaesthetic

anaesthetic or narcotic agent

to be bewitched; to be charmed