IPA: /ˈspɪrɪtləs/
KK: /ˈspɪrɪtləs/
Not having energy, enthusiasm, or liveliness; feeling dull or lifeless.
After a long week of work, I felt spiritless and unmotivated to go out.
Spiritless → It is formed from "spirit" (from Latin "spiritus", meaning breath or soul) and "-less" (meaning without). The word "spiritless" means lacking spirit or vitality, as if devoid of breath or life.
Think of someone who is 'without' ('-less') 'spirit' ('spiritus'), which helps you remember that 'spiritless' describes a lack of energy or enthusiasm.