legitimate
US /ləˈdʒɪt̬.ə.mət/
UK /ləˈdʒɪt̬.ə.mət/

1.
conforming to the law or to rules
:
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The court ruled that the business was operating under legitimate practices.
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He has a legitimate claim to the inheritance.
2.
able to be defended with logic or justification; reasonable
:
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She had a legitimate reason for being absent.
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His concerns about the project were entirely legitimate.
1.
make legitimate; justify or make lawful
:
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The new law will legitimate the use of cannabis for medical purposes.
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His efforts helped to legitimate the new artistic movement.