Adjectives

(s)meek, mild, modesthumble in spirit or manner; suggesting retiring mildness or even cowed submissiveness“meek and self-effacing”
(s)meek, tamevery docile“tame obedience”, “meek as a mouse” (Langston Hughes)
(s)meek, spiritlessevidencing 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”