What is the Latin word for gratuity?

The usual Latin words for “gratuity” are congiārius, honor. The right choice depends on the sense; see the distinctions below.

English → Latin

“gratuity” in Latin

congiāriusRelating to a congius; measured by volume honorhonor, esteem, dignity, reputation, office

The English word gratuity itself goes back to Latin grātuītus, through gratuitas.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

gratuity

munus pecuniae: praemium pecuniae or rei pecuniariae: congiarium (given to the people or soldiers; also to litterary men and artists; Suet., Vesp., 18): honos (Cic., payment to artists, litterary men, etc.). Vid. PRESENT, s.

Quick answer

What is the Latin word for gratuity?: The usual Latin words for “gratuity” are congiārius, honor. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.