sound+warningly
1knell — I. n. Death bell, passing bell, signal of doom or death. II. v. n. Knoll, sound warningly, sound with doom …
2warning — warningly, adv. /wawr ning/, n. 1. the act or utterance of one who warns or the existence, appearance, sound, etc., of a thing that warns. 2. something that serves to warn, give notice, or caution: We fired a warning at the intruders. 3. Meteorol …