tu tienigli

hold it for him/her, keep it for him/her

→ tenere
tieni 2nd-person singular imperative + gli to him
verb · second singular · imperative Rare #41,319
hold it for him/her, keep it for him/her Informal singular imperative of “tenere” with the pronoun “gli” attached.
IT: Tienigli questo libro mentre va a prendere il caffè.
EN: Hold this book for him while he goes to get coffee.
Conjugation of tenere

Se hai tempo, tienigli compagnia.

If you have time, keep him company.

— Ip Man (2008)

Tienigli la testa con delicatezza.

Hold his head gently.

— La società della neve (2023)

Tienigli indietro la testa.

Hold his head back.

— La storia fantastica (1987)

Tienigli un momento il cane.

Hold his dog for him for a moment.

— Amores perros (2000)