Verbs

(v)humblecause to be unpretentious“This experience will humble him”
(v)humiliate, mortify, chagrin, humble, abasecause to feel shame; hurt the pride of“He humiliated his colleague by criticising him in front of the boss”

Adjectives

(s)humble, low, lowly, modest, smalllow or inferior in station or quality“a humble cottage”, “a lowly parish priest”, “a modest man of the people”, “small beginnings”
(a)humblemarked by meekness or modesty; not arrogant or prideful“a humble apology”, “essentially humble … and self-effacing, he achieved the highest formal honors and distinctions” (B.K.Malinowski)
(s)humble, menial, lowlyused of unskilled work (especially domestic work)
(s)base, baseborn, humble, lowlyof low birth or station (‘base’ is archaic in this sense)“baseborn wretches with dirty faces”, “of humble (or lowly) birth”