noun combining form
Etymology: Middle English, from Old English -estre female agent; akin to Middle Dutch -ster
1. one that does or handles or operates <spinster> <tapster> <teamster> 2. one that makes or uses <songster> 3. one that is associated with or participates in <gamester> <gangster> 4. one that is <youngster>
New Collegiate Dictionary. 2001.