dative singular masculine + api (enclitic particle)
Analysis. ubhaya (both) + byābādha (affliction, harm); the dative ubhayabyābādhāya (to/for the affliction of both) + api (also, even) forms an adverbial phrase expressing the reason or circumstance of an action.
Etymology. ubhaya from √ubh (bend, curve, embrace) expressing duality; byābādha from vi- (apart) + ā- (toward) + √bhañj (break), literally 'breaking apart toward', hence affliction or suffering that divides or harms. The prefix vi- adds the sense of separation and distancing; ā- reverses the motion of √bhañj inward. Compare Sanskrit vyābādha (obstruction, disease).
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
Lite mode — plain HTML for e-readers and old browsers. Full version