self-depreciating

Centuries later, the term "self-depreciating" was coined to describe speech that belittles or humbles oneself.

But "self-depreciating" is a mouthful: six syllables, counting the dipthong as two.

He is not intended as a type of the meek, self-depreciating person who lets slander pass without a protest.

Soldiers—let a woman hesitate to speak of their dress and arms in any tone but that of self-depreciating humility.