From long(us) (“long, far”) + (h)inc (“hence”) + -uus. Compare propinquus.
Or the ending may come from some Proto-Indo-European *-n̥kʷo- seen in Ancient Greek ἀλλοδ-απός (allod-após), ποδ-απός (pod-após) (their first parts here correspond to Latin aliud, quod) etc. See also Proto-Germanic *-ungō.
longinquus (feminine longinqua, neuter longinquum, comparative longinquior, adverb longinquē or longinquō); first/second-declension adjective
First/second-declension adjective.
singular | plural | ||||||
---|---|---|---|---|---|---|---|
masculine | feminine | neuter | masculine | feminine | neuter | ||
nominative | longinquus | longinqua | longinquum | longinquī | longinquae | longinqua | |
genitive | longinquī | longinquae | longinquī | longinquōrum | longinquārum | longinquōrum | |
dative | longinquō | longinquae | longinquō | longinquīs | |||
accusative | longinquum | longinquam | longinquum | longinquōs | longinquās | longinqua | |
ablative | longinquō | longinquā | longinquō | longinquīs | |||
vocative | longinque | longinqua | longinquum | longinquī | longinquae | longinqua |