n. 25B6; adjective
each fibre has a hollow core : EMPTY, void, unfilled, vacant.
hollow cheeks : SUNKEN, deep-set, concave, depressed, indented.
a hollow voice : DULL, low, flat, toneless, expressionless; muffled, muted.
a hollow victory : MEANINGLESS, empty, valueless, worthless, useless, pyrrhic, futile, fruitless, profitless, pointless.
a hollow promise : INSINCERE, hypocritical, feigned, false, sham, deceitful, cynical, spurious, untrue, two-faced; informal phoney, pretend.
solid, worthwhile, sincere.
25B6; noun
a hollow under the tree : HOLE, pit, cavity, crater, trough, cave, cavern; depression, indentation, dip; niche, nook, cranny, recess.
the village lay in a hollow : VALLEY, vale, dale; Brit. dene, combe; N. English clough; Scottish glen, strath; poetic/literary dell.
25B6; verb a tunnel hollowed out of a mountain : GOUGE, scoop, dig, cut; excavate, channel.
25A0; beat someone hollow TROUNCE, defeat utterly, crush, rout, overwhelm, outclass; informal hammer, clobber, thrash, drub, lick, paste, crucify, slaughter, massacre, flatten, demolish, destroy, annihilate, walk over, wipe the floor with, make mincemeat of; Brit. informal stuff; N. Amer. informal shellac, cream, skunk.