Informal
Part of speech: adjective
Definition: Not formal or ceremonious; casual. Not in accord with the usual regulations; unofficial. Suited for everyday use. Reflecting everyday, non-ceremonious usage. Not organized; not structured or planned.
Example sentence: I love a modern suit paired with a polo or cotton T-shirt... and then paired with leather sneakers, or cashmere joggers with a tailored blazer and a sleeveless puffer vest to get the ultimate informal and formal combination.
Cozy
Part of speech: adjective
Definition: Affording comfort and warmth; snug; social
Part of speech: noun
Definition: A padded or knit covering to keep an item warm, especially a teapot or egg.A padded or knit covering for any item (often an electronic device such as a laptop computer).
Part of speech: verb
Definition: To become snug and comfortable.To become friendly with.
Example sentence: Once upon a time there was a piece of wood. It was not an expensive piece of wood. Far from it. Just a common block of firewood, one of those thick, solid logs that are put on the fire in winter to make cold rooms cozy and warm.