Basing Halacha on Dikduk of a choice of words is a bit of a stretch. You do that when you feel desperate. When it just can’t be, and you want to find that somehow it doesn’t mean that. If the Gemara would use a funny word to smile to people nobody would be pinpointing how it doesn’t really mean smile; it only means Sever Panim Yafos.
The Gemara earlier mentioned that when something is sweet you can take more that you thought possible. Perhaps that’s why we use that same term for drinking until Ad Delo Yada.