1. assistance given without hesitation, conditions, or limitations; wholehearted and complete support
The community offered unreserved help to the disaster victims.
A comunidade ofereceu ajuda sem reservas às vítimas do desastre.
2. support provided openly and without holding back or concealing one's willingness to assist
She gave unreserved help to her colleague on the project.
Ela deu ajuda sem reservas ao seu colega no projeto.