How to sign: a steep high face of rock
"he stood on a high cliff overlooking the town"; "a steep drop";
Categories: formation, geological formation
Within this category: crag, precipice
How to sign: change from a waking to a sleeping state
"he always falls asleep during lectures";
Similiar / Same: fall asleep, dope off, flake out, drift off, nod off, doze off, drowse off
Within this category: zonk out