Wiktionary
irrefusable
a. (context rare English) That which cannot be refused.
Usage examples of "irrefusable".
If I were you, I would write me back quickly and affectionately, an irrefusable letter from home.
My numbness vanished in a sudden jolt of pain, as incandescent and irrefusable as lightning.
Aleksander, for in the moment I discovered the luminous possibilities hidden in his depths, I exposed the irrefusable burden hidden in my own.