GRATIS
complimentary, costless, free, gratis, gratuitous
(adjective) costing nothing; “complimentary tickets”; “free admission”
gratis, for free, free of charge
(adverb) without payment; “I’ll give you this gratis”
Source: WordNet® 3.1
Etymology
Adjective
gratis (not comparable)
Free, without charge.
Synonyms
• free as in beer (used in the free software movement to distinguish from libre, "free as in speech")
Adverb
gratis (not comparable)
Free, without charge.
Anagrams
• striga, trigas
Source: Wiktionary
Gra"tis, adv. Etym: [L., contr. fr. gratiis out of favor or kindness,
without recompense, for nothing, fr. gratia favor. See Grace.]
Definition: For nothing; without fee or recompense; freely; gratuitously.
Source: Webster’s Unabridged Dictionary 1913 Edition