parvanimity

archaic countable uncountable

(now rare) The state or quality of having a little or ignoble mind; pettiness; meanness.

Japanese Meaning

心の狭さ：他者への思いやりや広い視野が欠け、狭い心である状態 / 卑劣さ：品位や尊厳に欠け、下劣な精神状態を示す / 小さな精神：精神的な狭さや狭量な態度を持つ状態

His constant criticism and refusal to celebrate others' successes revealed a parvanimity unbecoming of a leader.

彼の度重なる批判と他人の成功を祝わない態度は、リーダーにふさわしくない心の狭さを露呈していた。

Sense（1）

(now rare) The state or quality of having a little or ignoble mind; pettiness; meanness.

I coin this word parvanimity as an adequate antithesis to magnanimity

parvanimities

（ plural ）