Sly is finite state mathine for lex/yacc. State machine is represented as state transformation matrix and can be ported to various languages.

Dexterous in performing an action, so as to escape notice; nimble; skillful; cautious; shrewd; knowing; -- in a good sense.

Done with, and marked by, artful and dexterous secrecy; subtle; as, a sly trick.

Artfully cunning; secretly mischievous; wily.

marked by skill in deception; "cunning men often pass for wise"; "deep political machinations"; "a foxy scheme"; "a slick evasive answer"; "sly as a fox"; "tricky Dik"; "a wily old attorney"

Light or delicate; slight; thin.

Slyly.

Sneaky

Sloppy track condition.

Sly, ovvero La leggenda del dormiente risvegliato (English: Sly, or The Legend of the Sleeper Awoken) is an opera in three acts by Ermanno Wolf-Ferrari to an Italian libretto by Giovacchino Forzano, after William Shakespeare's The Taming of the Shrew. Unlike most of Wolf-Ferrari's other operas, this is a tragedy.