glatter

comparative degree of glatt

without roughness or unevenness: smooth; sleek, slick; even; clean (of a shave or cut); straight (of hair)
slippery (from e.g. ice, but not from grease)
(figuratively) smooth (without difficulty, problems, or unexpected consequences or incidents)
(informal) clear, unequivocal
smooth (being infinitely differentiable)
smooth (having bounded prime factors)
smoothbore
(Switzerland) funny
(obsolete) pretty