arduus

Etymology
From a, from , from +  (whence Latin ). Cognate with 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬.

Adjective

 * 1) lofty, high, steep, tall, elevated
 * 2) hard to reach, difficult, laborious, arduous