Irresistible means so tempting that you cannot say no. An irresistible offer, irresistibly funny, an irresistible urge.
In law an irresistible impulse was once a defence in some jurisdictions, and proving that somebody could not stop themselves turned out to be nearly impossible. Note the spelling — two r's and -ible rather than -able, which catches almost everybody.
1adjectiveirresistibleSo tempting that you cannot say no.
“The smell of fresh bread from the bakery was irresistible.”
irresistible is a quality of temptation.
Medieval Latin irresistibilis is in-, not, plus resistere, to resist — re plus sistere, to stand.
Medieval Latin
irresistibilis
Latin
irresistibilis
English, today
irresistible
Learned borrowing from Latin irresistibilis. Medieval Latin irresistibilis, equivalent to ir- + resistible.
Etymology from Wiktionary, CC BY-SA