Full of or characterized by advice; inclined to give advice frequently or abundantly.
From advice (from Old French avise, meaning 'opinion' or 'consideration') plus the suffix -ful meaning 'full of' or 'abounding in.' This is a rare or archaic formation.
This word is so uncommon that most modern dictionaries don't even include it—it's a fossil that shows how English speakers could theoretically create any adjective by adding -ful, but not all combinations survive into common use.
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