とばかり

Etymology 1
From + adverbial particle.

Phrase

 * 1) and only, if only
 * 2) * 1086, ' (book 13, poem 750; also ', poem 63)
 * 3) if possible
 * 1) if possible

Etymology 2
From adverb + adverbial particle.

Adverb

 * 1) momentarily, shortly