As a noun pettiness
is the quality of being petty.
As an adjective childish is
of or suitable for a child.
The quality of being petty.
:The pettiness of the accounting department asking me to save a receipt from a fast-food restaurant was absurd.
A petty behaviour, attitude, etc.
Of or suitable for a child.
- Your childish temper tantrums are not going to change my decision on this matter.
* (behaving immaturely) infantile, immature, silly, unbecoming, juvenile