looker-on

n (pl lookers-on) / 9lUkEz5Cn; 9lJkLz`Bn/ person who watches sth but does not take part in it; spectator; onlooker 观者; 旁观者.

look on, look one's best, look out, look out of, look over, look over sth, look round, look through, look through sb, look to, look up, look up to, look up to sb., look upon...as..., look-alike, look-in, look-out, look-over, look-through, looker, looking-glass, lookout, loom, loony, loony-bin, loop, loop-line, loophole, loopy, loose, loose box, loose covers, loose-, loose-leaf, loosely, loosen, looseness, loot, lop, lop-eared,