IPA: /ˈtʃɛrɪʃər/
KK: /ˈtʃɛrɪʃər/
A person who holds something dear or values it highly.
She is a cherisher of old traditions and family values.
Cherisher → It is formed from "cherish" (from Old French *cherir*, meaning to hold dear or to treat with affection) and "-er" (meaning a person who). A cherisher is a person who holds something dear or treats it with affection.
Think of someone who 'holds dear' ('cherish') something or someone — the '-er' just means a person. A cherisher is someone who cherishes.