Wunst

"Mrs Harris," I says to her, "none on us knows what we can do till we tries; and wunst, when me and Gamp kept 'ouse, I thought so too.

Source: wiktionary

Wouldn't they let him and Sam off this wunst?

Source: wiktionary

"If it was just for wunst," she had begun, when Tishy tweaked her sleeve viciously and interpolated a rapid whisper, "It wont be; there'll be no ind to it if you begin humourin' them," so the sentence was badly dislocated.

Source: wiktionary

By way of an incident: a pair of these primitives were overheard chatting about the resorters, one day, and in the course of their talk this remark was dropped: "I was a-drivin' a passel of 'em round about yisterday evenin', quiet ones, you know, still and solemn, and all to wunst they busted out to make your hair lift and I judged hell was to pay.

Source: wiktionary