To increase the volume of.

1. To give a boost to; be beneficial to.
2. To increase or raise; SYN. advance.
3. To increase the voltage of; SYN. supercharge.
4. To push or shove upward, as if from below or behind.

1. To add nutrients to; as of foods.
2. To enclose by a fortification; SYN. fort.

1. To become more intense; SYN. deepen.
2. To make more intense, stronger, or more marked;,; SYN. compound, heighten, deepen.

Variant of reinforce

1. To make stronger; SYN. reenforce.
2. To strengthen and support with rewards; SYN. reward.
3. To stimulate (as an experimental animal or a student) with a reinforcer; also; to encourage (a response) with a reinforcer

1. To gain strength
2. To make strong or stronger; SYN. beef up, fortify.