AND ALACK' (5 letters) The term 'ALAS and Alack' is an expression of sorrow or regret. It is often used to express disappointment or dismay, and is usually used in a rhetorical manner. The term 'ALAS' is derived from the Old English word 'alæs', which means 'UNFORTUNATE'. The term 'Alack' is derived from the Middle English word 'alacke', which means 'to bewail'. Together, these two words are used to express deep sorrow or regret.