sure

/ˈshu̇r/

Middle English seur, sure, from Anglo-French seur, from Latin securus secure

adjective

  1. marked by or given to feelings of confident certainty

  2. characterized by a lack of wavering or hesitation

  3. admitting of no doubt : indisputable

I'm sure I'm right

sure brush strokes

sure certain positive cocksure mean having no doubt or uncertainty. sure usually stresses the subjective or intuitive feeling of assurance. certain may apply to a basing of a conclusion or conviction on definite grounds or indubitable evidence.

adverb

  1. surely

adjective

  1. actual, genuine, real