IPA: /ˈlævɪʃər/
KK: /ˈlævɪʃər/
A person who gives or spends freely and generously, often in a way that is extravagant or excessive.
The lavisher threw a grand party, inviting everyone and providing lavish gifts.
Lavisher → It is formed from "lavish" (from Middle English *lavissh*, meaning extravagant or profuse) and the suffix "-er" (meaning a person who). A lavisher is a person who is extravagant or gives freely and generously.
Think of someone who is 'extravagant' ('lavish') and the '-er' just means a person. A lavisher is someone who gives generously.