n. 25B6; adjective
an assured voice : CONFIDENT, self-confident, self-assured, self-possessed, poised, phlegmatic, level-headed; calm, composed, equanimous, imperturbable, unruffled; informal unflappable, together.
an assured supply of weapons : GUARANTEED, certain, sure, secure, reliable, dependable, sound; infallible, unfailing; informal sure-fire.
doubtful, uncertain.