sly and crafty; wily and experienced
Describes someone who is both cunning and seasoned, often with a negative connotation. Rare literary word; not used in everyday conversation.
He outwitted his opponent with a sly and crafty scheme.
That politician is wily and experienced, and doesn't easily show his true intentions.
Compound of 狡猾 (cunning, sly) and 老獪 (crafty from experience). The exact historical derivation is uncertain; the spelling is conventionally associated with these meanings.