WordNet sense 1 (low or inferior in station or quality):

lowly, small

WordNet sense 2 (used of unskilled work (especially domestic work)):

menial

WordNet sense 3 (not having or showing or requiring special skill or proficiency):

unskilled

WordNet sense 4 (humble in spirit or manner; suggesting retiring mildness or even cowed submissiveness):

meek, mild, modest

WordNet sense 5 (subdued or brought low in condition or status):

broken, humiliated, low, crushed, humbled

WordNet sense 6 (cause to feel shame; hurt the pride of):

abase, chagrin, humiliate, mortify

WordNet sense 7 (of low birth or station (`base' is archaic in this sense)):

base, baseborn

WordNet sense 8 (of humble birth or origins):

lowborn