"baser" in the adjective sense
1. basal, base
serving as or forming a base
"the painter applied a base coat followed by two finishing coats"
2. base, baseborn, humble, lowly
of low birth or station (`base' is archaic in this sense
"baseborn wretches with dirty faces"
"of humble (or lowly) birth"
used of metals) consisting of or alloyed with inferior metal
"base coins of aluminum"
"a base metal"
4. base, immoral
not adhering to ethical or moral principles
"base and unpatriotic motives"
"a base, degrading way of life"
"cheating is dishonorable"
"they considered colonialism immoral"
"unethical practices in handling public funds"
5. base, mean, meanspirited
having or showing an ignoble lack of honor or morality
"that liberal obedience without which your army would be a base rabble"- Edmund Burke
"taking a mean advantage"
"chok'd with ambition of the meaner sort"- Shakespeare
"something essentially vulgar and meanspirited in politics"
6. base, baseborn
debased not genuine
"an attempt to eliminate the base coinage"
Source: WordNet® (An amazing lexical database of English)
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