The term 'least spirited' can be described by three crossword solutions: tamest (6 letters), deadest (7 letters), and droopiest (9 letters). Tamest refers to something that is very quiet, subdued, or gentle. Deadest implies something that is completely lifeless or inactive. Droopiest suggests something that is limp, weak, or lacking energy. All three words describe a lack of enthusiasm, energy, or liveliness.