Aqua fortis is a Latin term meaning 'strong water' and is composed of the crossword solutions nitrated (8 letters), ACID (4 letters), TEAL (4 letters), lenis (5 letters), regia (5 letters), and vitae (5 letters). Nitrated refers to a compound that has been treated with nitric ACID, while ACID is a substance that has a pH level lower than 7. TEAL is a shade of blue-green, lenis is a term used to describe a sound that is soft or gentle, regia is a Latin word meaning 'ROYAL', and vitae is a Latin word meaning 'LIFE'. Together, these words form the phrase 'strong water of LIFE, ROYAL blue-green, gently nitrated ACID'.