In the midst of' is a phrase that is used to describe a situation in which someone or something is surrounded by other things. Poetically, this phrase can be expressed using the words 'mongst, ' 'tween, ' and 'TWIXT, ' all of which have six letters. Mongst is an archaic word meaning 'AMONGST, ' while tween and TWIXT are both poetic terms meaning 'BETWEEN.' Together, these three words can be used to express the idea of being in the midst of something.