‘ītoatoa

‘ītoatoa, v.i. Make heroic efforts, strive bravely, try valiantly.

Kua ‘ītoatoa ‘aia i te ‘aere inārā kua mataku ‘aia nō te pōiri.
He tried valiantly to (make himself) go, but the dark scared him;

Kia kite atu ‘aia i te pārau i te ngā‘i ‘ō‘onu, kua ‘ītoatoa ‘aia i te ruku ē te ‘openga kua rauka mai.
When he saw a pearl oyster in a deep place he made great efforts to dive down and in the end he got it;

I tōna ‘ītoatoa‘anga kia tae ‘aia ki te take o te maunga, kua patere ‘aia ē kua ‘ati tōna rima.
While striving to reach the summit of the mountain he slipped and broke his arm.
[‘ī-7, toa2 RR.]