Origin: Latin suffix -ous
Advantageous has 3 different meanings across 1 category:
giving an advantage
"a contract advantageous to our country"
"socially advantageous to entertain often"
appropriate for achieving a particular end; implies a lack of concern for fairness
"The committee approved the advantageous policy that granted tax breaks only to wealthy donors while ignoring small businesses."
Being of advantage, beneficial.
"Taking that extra shift was advantageous for my career growth and helped me save enough money to buy a new car."