Helpmate (noun)

A person or thing that helps or supports another person or thing.

Origin:

The word "helpmate" comes from the old english word "helpmǣt" meaning "one that helps or is helpful".

Examples:

1. She was a devoted helpmate to her husband, who had lost his ability to walk.
2. The dog was a loyal helpmate to the blind man, guiding him through the streets.
3. The computer was a great helpmate to the scientist, helping her to analyze her data.
4. The two friends made a great team, one was the brains and the other was the helpmate.
5. The wife was a helpmate to the husband in the kitchen, helping him to prepare the food for the party.