a general intensifier, definitely, absolutely.
|DN II:v 332: sure, adv. Pronounced shore, as ‘shore fine’.‘Dialect of Southeastern Missouri’ in|
|Smoke Bellew Pt 11 [Internet] This has the makin’s of a Jim-dandy suburb, an’ it sure looks like it’ll be some popular.|
|Somewhere in Red Gap 54: The minute I get plumb sure mad I get wily.|
|Home to Harlem 211: She is sure some wonderful brown. [...] Now I sure does understand why Ray is so scornful of them easy ones.|
|Sister of the Road (1975) 33: The shacks are hostile, and the railroad dicks will glom you sure, unless you’re lucky.|
|in Damon Runyon (1992) 39: The guy from Boston sure could handset type: he did a column in forty-three minutes.|