何たるか (what something truly is)
idiom1 sentence
The literary noun phrase 何たるか, formed from 何 ('what') + classical たる (= current である) + か (embedded question). Means 'what [X] is, the essence of [X],' as in 教育の何たるかを理解する ('grasp what education truly is'). Belongs to formal/written register.
End of results — 1 loaded.