Synonyms and related words :
answer, bottom, clear up, crack, decipher, decode, disentangle, divine, do, dope, dope out, explain, fathom, figure out, find out, find the answer, find the solution, get, get right, guess, guess right, have it, hit it, interpret, make out, open the lock, plumb, psych, psych out, puzzle out, ravel, ravel out, resolve, riddle, solve, sort out, undo, unlock, unravel, unriddle, unscramble, untangle, untwist, unweave, work, work out,