different between useful vs judicious

English

From use +? -ful.

useful (comparative usefuller or more useful, superlative usefullest or most useful)

Having a practical or beneficial use.
Synonyms: noteful, serviceable, utilitarian, utile
Antonyms: unuseful, useless, harmful

Prepositions: useful is used in useful for <purpose>, useful for <person> and useful to <person>. The words useful to are also found in constructions such as It is useful to do, in which to marks an infinitive rather than being a preposition.

Based on Middle French judicieux, itself ultimately derived from Latin iudico. Related to judge.

judicious (comparative more judicious, superlative most judicious)

Having, characterized by, or done with good judgment or sound thinking.
Synonym: sagacious

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