There are four varieties of commercially viable coffee: Arabica, Liberica, Excelsa, and Robusta. Growers predominantly plant the Arabica species. Although less popular, Robusta tastes slightly more bitter and contains more caffeine.
indomitable, never-say-die, unsubduable
(adjective) impossible to subdue
Source: WordNet® 3.1
unsubduable (not comparable)
That cannot be subdued; indomitable.
• subduable
Source: Wiktionary
18 October 2024
(adjective) causing or marked by grief or anguish; “a grievous loss”; “a grievous cry”; “her sigh was heartbreaking”; “the heartrending words of Rabin’s granddaughter”
There are four varieties of commercially viable coffee: Arabica, Liberica, Excelsa, and Robusta. Growers predominantly plant the Arabica species. Although less popular, Robusta tastes slightly more bitter and contains more caffeine.