From Wiktionary, the free dictionary
Alteration of fjeshtër (Arbëreshë), borrowed from Latin filiaster (“step-son”).
thjeshtër m (plural thjeshtër, definite thjeshtri, definite plural thjeshtrit)
- stepson
- stepchild
- “thjeshtër”, in FGJSSH: Fjalor i gjuhës së sotme shqipe [Dictionary of the modern Albanian language][1] (in Albanian), 1980
- “thjeshtër”, in FGJSH: Fjalor i gjuhës shqipe [Dictionary of the Albanian language] (in Albanian), 2006