/son"see/ , adj., sonsier, sonsiest . Scot. and North Eng., Irish Eng.
1. strong and healthy; robust.
2. agreeable; good-natured.
Also, sauncy, sonsie .
[ 1525-35; sonse prosperity, good fortune (ME (Scots) sonas, MIr sonus, deriv. of sona prosperous, happy, OIr son ) + -Y 1; cf. DONSIE ]