Adverb
irresistably (comparative more irresistably, superlative most irresistably)
Dated form of irresistibly.
Although I opted for the tasting menu, I could not help being irresistably drawn to all of the delicious sounding dishes listed among the three course options. Source: Internet
Fans of the Pout-Pout Fish will be pleased to see him return in an irresistably rhymed new adventure. Source: Internet