sekolah lanjutan tingkat pertama

Compound of sekolah lanjutan (“high school (US), secondary school (UK)”) +‎ tingkat (“grade”) +‎ pertama (“first”) from either

• Calque from Japanese 初等 (shotō, “beginner, primary”) +‎ 中学校 (chūgakkō, “secondary (middle) school”). The post-war Japanese term is 中学校 (chūgakkō), or
• Calque from Chinese 初級中學／初级中学 (chūjí zhōngxué, “junior middle school”).

sekolah lanjutan tingkat pertama

1. (education, dated) junior high school (US), lower secondary school (UK).

   Synonym: sekolah menengah pertama

• “sekolah lanjutan tingkat pertama” in Kamus Besar Bahasa Indonesia, Jakarta: Agency for Language Development and Cultivation – Ministry of Education, Culture, Research, and Technology of the Republic of Indonesia, 2016.