What does alpestris mean in Latin?

alpestris, a adjective, means “Alpine”.

How do you pronounce alpestris?

In classical Latin, [aɫˈpɛs.trɪs]; in ecclesiastical (church) Latin, [alˈpɛs.tris].

adjectivethird-declension two-termination adjective

alpestris (neuter alpestre)

Classical[aɫˈpɛs.trɪs]Ecclesiastical[alˈpɛs.tris]

singular
form	masculine	feminine	neuter
nominative	alpestris	alpestris	alpestre
genitive	alpestris	alpestris	alpestris
dative	alpestrī	alpestrī	alpestrī
accusative	alpestrem	alpestrem	alpestre
ablative	alpestrī	alpestrī	alpestrī
vocative	alpestris	alpestris	alpestre

plural
form	masculine	feminine	neuter
nominative	alpestrēs	alpestrēs	alpestria
genitive	alpestrium	alpestrium	alpestrium
dative	alpestribus	alpestribus	alpestribus
accusative	alpestrīs alpestrēs	alpestrīs alpestrēs	alpestria
ablative	alpestribus	alpestribus	alpestribus
vocative	alpestrēs	alpestrēs	alpestria

From Alpēs + -estris.