Full of curses; prone to cursing or using foul language; expressing strong anger or disapproval (an archaic or rare term).
From 'curst' (cursed) plus the suffix '-ful' meaning 'full of' or 'characterized by,' creating an adjective describing something abundant in curses.
Sailors and old literature are full of 'curstful' characters—people so angry they can barely speak without swearing!
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