expression, noun which may take the genitive case particle 'no'
(not) even a little; (not) a tiny bit
Used in negative sentences to emphasize that there is absolutely none of something, not even a hair's breadth. Often with ない or similar negative forms.
There isn't even a shred of truth in his story.
I don't have the slightest interest in that plan.
Standard spelling; 毛 (hair) + ほど (extent) literally 'even the amount of a hair'.
Alternate kanji spelling using 程 for ほど; less common but seen.
Compound of 毛 (ke, 'hair') and ほど (hodo, 'extent, degree'), literally 'even the amount of a hair'. Used idiomatically in negative contexts to mean 'not even a tiny bit'.