1. A librettist who was a collaborator with Sir Arthur Sullivan in a famous series of comic operettas (1836-1911)
   - Gilbert, William Gilbert, William Schwenk Gilbert, Sir William Gilbert

Type of: librettist, poet

• unflappable
• unflattering
• unflavored
• unflavoured
• unflawed
• unfledged
• unflinching
• unflinchingly
• unfluctuating
• unflurried
• unflustered
• unfocused
• unfocussed
• unfold
• unfolding
• unforbearing
• unforced
• unforceful
• unforeseeable
• unforeseen
• unforesightful
• unforested
• unforethoughtful
• unforfeitable
• unforgettable