حُسَيْنَى
One's utmost, [or rather one's best,] or the utmost of one's power or ability or deed or case: so in the saying, حُسَيْنَاهُ أَنْ يَفْعَلَ كَذَا [His utmost, or best, &c., is, or will be, the doing such a thing]: and
حُسَيْنَاوءُهُ means the same. (K, * TA.)