The Collaborative International Dictionary
Impendent
Impendent \Im*pend"ent\, a. [L. impendens, p. pr. of impend[=e]re.] Impending; threatening.
Impendent horrors, threatening hideous fall.
--Milton.
Douglas Harper's Etymology Dictionary
impendent
1590s, from Latin impendens "impending," present participle of impendere (see impend).
Wiktionary
impendent
a. impending; threatening