(adverb)
(used to introduce a logical conclusion) from that fact or reason or as a result
the witness is biased and so cannot be trusted
(noun)
the syllable naming the fifth (dominant) note of any musical scale in solmization
(adverb)
in the way indicated
hold the brush so
(adverb)
in truth (often tends to intensify)
he did so do it!
(adverb)
subsequently or soon afterward (often used as sentence connectors)
and so home and to bed
(adverb)
to a very great extent or degree
the idea is so obvious
never been so happy
I love you so
my head aches so!