proficient /prə- or prō-fishˈənt/

1. Competent
2. Well-skilled
3. Thoroughly qualified

1. A person who is making progress in learning (Shakespeare)
2. An adept
3. An expert

profiˈcience (now rare or obsolete) or profiˈciency noun

profiˈciently adverb

• screencrafts
• screen door
• screen doors
• screen dump
• screen dumps
• screened
• screener
• screeners
• screenful
• screenfuls
• screen grab
• screen grabs
• screen grid
• screen grids
• screening
• screenings
• screening test
• screening tests
• screen off
• screenplay
• screenplays
• screen printing
• screen process
• screens
• screen saver