spiritless

lacking ardor or vigor or energy

• “a spiritless reply to criticism”

lacking spirit

• “it was a spiritless attempt”

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” Orville Prescott
• “she looked meek but had the heart of a lion”
• “was submissive and subservient”