"The word 'Hello' is used for greeting."
Arreno is a masculine word, derived from the word arrhen (the meaning of the word “fantasy dragon”, used in J. R. R. Tolkien’s book “The Lord of the Rings”), abbreviated as erren, to avoid phonetic homophony with the colloquial word hello (English . - greetings). The masculine noun for Tolkien's arren is a euphemism (an allusion to dragon), and the masculine or neuter noun hello is a full-fledged full-valued English word. Russian borrowing is due to the fact that the common noun arrhen from arrena in Russian