In Latin there are two supines, I. and II. They are originally the accusative and dative or ablative forms of verbal noun in the fourth declension, respectively. The first supine is often used as the fourth principal part of Latin verbs and ends in -um. It has two uses. The first is with verbs of motion and indicates purpose. For example, "Gladiatores adfuerunt pugnatum" is Latin for "The gladiators have come to fight", and "Legati gratulatum et cubitum venerunt" is Latin for "The messengers came to congratulate and to sleep." The second usage is in the Future Passive Infinitive, for example "amatum iri" means "to be about to be loved". It mostly appears in indirect statements, for example "credidit se necatum iri", meaning "he thought that he was going to be killed".
The second supine can be used with adjectives but it is rarely used and only a small number of verbs traditionally take it. It is derived from the dativus finalis which expresses purpose or the ablativus respectivus which indicates in what respect. It is the same as the first supine minus the final -m and with lengthened "u". "Mirabile dictū", for example, means "amazing to say", where dictū is a supine form.
In other languages
Outside of Latin, a supine is a non-finite verb form whose use resembles that of the Latin supine.
The Romanian supine generally corresponds to an English construction like for doing; for example, "Această carte este de citit" means "This book is for reading."
The Slovene supine is used after verbs of movement. See Slovenian verbs. The supine was used in Proto-Slavic but it was replaced in most Slavic languages by the infinitive in later periods. In Czech, the contemporary infinitive ending -t (formerly -ti) originates from the supine.