The term 'comfortably informal' can be summed up with the word 'HOMEY, ' which is a five-letter word. HOMEY is an adjective that describes a feeling of comfort and familiarity, often associated with one's home. It is often used to describe a relaxed atmosphere or environment, such as a cozy living room or a friendly gathering. HOMEY can also refer to a style of clothing or decor that is comfortable and inviting.