Present participle of 'basiate'; the act of kissing or currently engaged in kissing.
From 'basiate' (to kiss) + present participle ending '-ing'. Standard English verb form of the Latin-derived root.
If you ever read old romantic poetry and see 'basiating,' you're looking at writers who preferred showing off their Latin knowledge over using everyday English words—it's a pretty pretentious way to say 'kissing.'
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