adjective/peɾtiˈnaθ/
pertinacious; enduring, persistent
“sequía pertinaz” — long-lasting drought
Synonyms: obstinado, tenaz, terco, duradero, persistente
Etymology tree Latin pertineō Proto-Indo-European *-eh₂-k-s Proto-Italic *-āks Latin -āx Latin pertinaxlbor. Spanish pertinaz Learned borrowing from Latin pertinax.