ADJ. main, major, serious | basic, fatal, fundamental | minor, slight, small | obvious | design
VERB + FLAW have Unfortunately, this plate has a slight flaw in it. | look for | discover, find, identify, see It took me a long time to find the flaw in her logic. Engineers have identified serious design flaws in the proposed nuclear waste dump. | expose, highlight, point out/to, reveal The markets have exposed the fatal flaw in the government's economic policy.
FLAW + VERB appear Flaws have appeared in the new version of the software.
PREP. ~ in one of the major flaws in his character