What does stipulus mean in Latin?

stipulus, a adjective, means “stable, firm”.

How do you pronounce stipulus?

In classical Latin, [ˈstɪ.pʊ.ɫʊs]; in ecclesiastical (church) Latin, [ˈstiː.pu.lus].

adjectivefirst/second-declension adjective

stipulus (feminine stipula, neuter stipulum)

Classical[ˈstɪ.pʊ.ɫʊs]Ecclesiastical[ˈstiː.pu.lus]

singular
form	masculine	feminine	neuter
nominative	stipulus	stipula	stipulum
genitive	stipulī	stipulae	stipulī
dative	stipulō	stipulae	stipulō
accusative	stipulum	stipulam	stipulum
ablative	stipulō	stipulā	stipulō
vocative	stipule	stipula	stipulum

plural
form	masculine	feminine	neuter
nominative	stipulī	stipulae	stipula
genitive	stipulōrum	stipulārum	stipulōrum
dative	stipulīs	stipulīs	stipulīs
accusative	stipulōs	stipulās	stipula
ablative	stipulīs	stipulīs	stipulīs
vocative	stipulī	stipulae	stipula

stĭpŭlus, a, um, adj. (old Lat.),

I. firm: stipulum apud veteres firmum appellabatur, Just. Inst. 3, 15; Paul. Sent. 5, 7, § 1.

From Proto-Indo-European *steyp- (“stiff, erect”). See Latin stips, Latin stipō and English stiff.