flaw

US /flɑː/
UK /flɑː/
"flaw" picture
1.

a mark, blemish, or other imperfection which mars a substance or object

:
The diamond had a tiny flaw that reduced its value.
Check the fabric for any flaws before cutting.
2.

a weakness or shortcoming in a plan, statement, or character

:
The only flaw in his argument was a lack of evidence.
Pride was his greatest flaw.
1.

to make imperfect or defective

:
A single mistake could flaw the entire project.
His reputation was flawed by the scandal.