half-boarder

If he find but a good look to assure his welcome, he becomes their half-boarder, and haunts the threshold so long 'till he forces good nature to the necessity of a quarrel.

Microcosmography or, a Piece of the World Discovered; in Essays and Characters John Earle

Mrs. Colville, whose maiden name was Chandler, was the daughter of a reputable tradesman, and brought up at a boarding-school at Exeter as a half-boarder, where she was taught all those ridiculous accomplishments which serve but to dis-qualify

The Offspring of Fancy Anonymous 1778

I was a half-boarder at Chelfea, and I fpeak French like a native — Comment vous porter vous 9 Mounjieur.

A Collection of the Most Esteemed Farces and Entertainments Performed on the British Stage ... 1786

You know, likewise, that this girl was early entrusted to my mother’s care, which made her doubly solicitous to save her, therefore kept her in a manner confined in the house, till she could fix her in some safer situation; and not finding a place of servitude for her, equal to her wishes, put her as a half-boarder to Mrs. Dykes, near

Vicissitudes in Genteel Life 1794