Incorrect spelling, explanation: this form is incorrect, because despite pronunciation, which for some may point to propably, the word comes from Latin probabilis, so it should be spelled with b, not p. The form with b – probably has been already known in the 15th century (probabli). Thus probably is the correct form.

Correct spelling, explanation: probably is the correct form; it has been known already in the 15th century as probabli. It comes from Latin probabilis, so we can clearly see that b makes sense there. This means propably is a mistaken form. The correct form is probably.

Definition of probably:
adverb, apparently, very likely
Jack won’t pass this test probably.
Probably we should go now, it’s late.

Incorrect spelling

Incorrect spelling

Incorrect spelling

Incorrect spelling

Incorrect spelling