Part of speech: Adverb
(of quantities) imprecise but fairly close to correct
Example: lasted approximately an hour; in just about a minute; he's about 30 years old; I've had about all I can stand; we meet about once a month; some forty people came; weighs around a hundred pounds; roughly $3,000; holds 3 gallons, more or less; 20 or so people were at the party
Approximately, Close to, Some, More or less, Just about
approximate – A related word in the same word family.
ly – A related word in the same word family.
The average English speaker uses vocabulary descended from dozens of ancient languages daily.