Full of cause or purpose; productive of good causes or results; archaic term meaning having important consequences.
From 'cause' plus the adjective suffix '-ful' (full of). This archaic or rare formation parallels common words like 'meaningful' or 'purposeful,' creating an adjective meaning full of cause or significance.
This rare word appears occasionally in older literature—it's like saying something is 'full of reason' or 'meaningful,' reminding us that 'cause' once meant reason and purpose, not just physical causation!
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