1.
If you describe something such as a desire or force as ~, you mean that it is so powerful that it makes you act in a certain way, and there is nothing you can do to prevent this.
It proved an ~ temptation to Hall to go back.
= overwhelming
ADJ
irresistibly
I found myself irresistibly drawn to Steve’s world.
ADV: ADV with v
2.
If you describe something or someone as ~, you mean that they are so good or attractive that you cannot stop yourself from liking them or wanting them. (INFORMAL)
The music is ~.
ADJ
irresistibly
She had a gamine charm which men found irresistibly attractive.
ADV: ADV adj