Alarming

1. (p. pr. & vb. n.) of Alarm.

2. (a.) Exciting, or calculated to excite, alarm; causing apprehension of danger; as, an alarming crisis or report. -- Alarmingly, adv.

Thesaurus Entries

awing, bad, chilling, critical, dangerous, dangersome, daunting, deterrent, deterring, disconcerting, discouraging, disheartening, dismaying, disquieting, explosive, fear-inspiring, fearful, fearsome, fraught with danger, frightening, frightful, jeopardous, menacing, overawing, parlous, periculous, perilous, scaring, scary, serious, startling, threatening, ugly