This is the 11391st most frequent French word.
relatives
Relatives: Family members.
The word 'relatives' here is a straightforward use of the noun referring to family members.
Elle a invité toutes ses relatives à la fête.
She invited all her relatives to the party.
In this context, 'relatives' is used as an adjective derived from the noun, meaning 'regarding' or 'concerning' certain matters.
Les lois relatives à la sécurité devront être renforcées.
The laws relating to safety will need to be strengthened.
Here, 'relatives' is again functioning as an adjective, signifying connection or pertinence to 'the project.'