to keep them, to hold them, to hold (something) for her
Sto cercando di tenerle in vita.
I'm trying to keep them alive.
Voglio soltanto tenerle la mano.
I just want to hold her hand.
Se avessi avuto tre navi a due alberi, avrei potuto tenerle tutte occupate.
If I’d had three two-masted ships, I could have kept them all busy.