The term 'emollient plant' refers to a type of plant that has the ability to soothe and soften the skin. Aloe is one such plant, and it is a four-letter word that can be used to solve the crossword. Aloe is a succulent plant species that is native to Africa and is widely used in cosmetics and skin care products due to its moisturizing and healing properties. It is also known for its anti-inflammatory and antiseptic qualities, making it an ideal choice for treating sunburns and other skin irritations.