IPA: //ˈkwɪltər//
KK: /ˈkwɪltər/
A person who makes quilts, either as a hobby or professionally, by sewing together layers of fabric and often adding decorative stitching.
My grandmother is a talented quilter who creates beautiful patchwork quilts.
Quilter → It is formed from "quilt" (from Old French *cuilte*, meaning a bed covering made of two layers of fabric) and "-er" (meaning a person who). A quilter is a person who makes quilts.
Think of someone who makes a 'covering' ('quilt') for a bed, and the '-er' just means a person. A quilter is someone who creates these beautiful bed coverings.