(a measure word); to support; to sustain; to erect; to raise; branch; division; to draw money
|simp. and trad.
From 支 ("to support, to put up") + 吾 ("to resist, to withstand"). The semantic development was "to support > to resist, to defy > to cope with, to deal with > to (fail to) resist > to stall off, to boggle > to falter, to equivocate". All other senses are basically obsolete in the modern language.