Full of aid; generous in providing help or assistance; characterized by helpfulness.
From 'aid' + '-ful' (suffix meaning full of or characterized by); follows the pattern of other '-ful' adjectives like 'helpful,' 'graceful,' and 'thoughtful.'
The suffix '-ful' is one of English's most productive affixes—almost any noun can become '-ful' to mean 'full of it,' which is why we can create words like 'snackful' even if they're not in the dictionary.
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