This is the 881st most frequent Czech word.
výboru
"Výboru" means "of the committee" or "of the board" in English.
Here, 'výboru' refers to the committee, specifically in the dative case to indicate the group to which proposals are submitted.
Výboru bylo k projednání předloženo několik návrhů.
Several proposals were submitted to the committee for discussion.
In this sentence, 'výboru' is used in the genitive case, specifying the members belonging to the committee.
Členové výboru hlasovali o nové směrnici.
The members of the committee voted on the new directive.
'Výboru' is in the dative case again, denoting movement toward or into the committee for further action.