Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
spiritless is an adjective meaning "lacking ardor or vigor or energy". It carries 2 recorded senses.
evidencing little spirit or courage; overly submissive or compliant
“compliant and anxious to suit his opinions of those of others”
“a fine fiery blast against meek conformity”
“she looked meek but had the heart of a lion”
“was submissive and subservient”
Definitions, synonyms and semantic relations for spiritless come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.