portance
The manner in which one carries oneself; behaviour.
obsolete, uncountable
[…] for in court gay portaunce he perceiu'd, / And gallant shew to be in greatest gree […]
Where it comes from
From Middle French portance (“a carrying, support”), from porter (“to carry”), from Latin portare (“carry, bear, convey”).
Adapted from the Wiktionary entry portance (CC BY-SA 4.0).