平更

ひらさら

adverb

earnestly, intently, determinedly, by all means(usually kana, archaism)

... the heck (e.g. "what the heck?"), ... in the world (e.g. "why in the world?"), ... on earth (e.g. "who on earth?")(usually kana, archaism)

平	even, flat, peace
更	grow late, night watch, sit up late, of course, renew, renovate, again, more and more, further