to run is a form of:

Childish



adjective
1.
(Like a child unsuitable for a grown person) ដូចកូនក្មេង, ដែលមានលក្ខណៈ ឬចរិកជាក្មេង, នៃទារក, ដែលឡិករឡក់, ដែលមិនបានការ
Example: A childish way of talking, it is childish to want your own way all the time.
ENGLISH MEANING
adjective
1.
Puerile; trifling; weak.
2.
Of, pertaining to, befitting, or resembling, a child.
1.
childlike, foolish, immature, infantile, juvenile, youthful