chink

1 a vulnerable point before the tournament she studied tapes of her chief rival, looking for the chink in her game Synonyms back, Achilles' heel, jugular, soft spot, underbellyRelated Words downfall, ruin, undoing; hamartia, tragic flaw

2 an irregular usually narrow break in a surface created by pressure plugged the chinks in the walls with mortar Synonyms check, crack, cleft, cranny, crevice, fissure, rift, splitRelated Words crevasse; craze, hairline; fracture, rupture; breach, gap, opening; cut, gash, incision, slit