Answer: portentous

AnswerCrossword Clue
PORTENTOUSOminously significant
PORTENTOUSOminous.
PORTENTOUSSinister.
PORTENTOUSAmazing
PORTENTOUSArousing amazement
PORTENTOUSThreatening
PORTENTOUSOverblown
portentousforeboding; ominous.
portentousof, relating to, or constituting a portent
portentousominously significant or indicative
portentousof the nature of a portent; momentous
portentousmarvelous; amazing; prodigious