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95. The Stem of nouns of the Fifth Declension ends in ē-, which appears in all the cases. The Nominative is formed from the stem by adding s.

96. Nouns of the Fifth Declension are declined as follows:—

rēs , F., thing diēs, M., day fidēs, F., faith
STEM - STEM diē- STEM fidē-

Note.--The ē of the stem is shortened in the genitive and dative singular of fidēs, spēs , rēs , but in these it is found long in early Latin. In the accusative singular e is always short.

NOM. rēs diēs fidēs -ēs
GEN. rĕī diēī (di ē fidĕī -ēī (-ē
DAT. rĕī diēī (di ē fidĕī -ēī (-ē
ACC. rem diem fidem -em
ABL. rē diē fidē -ē
NOM. rēs diēs -ēs
GEN. rērum diērum -ērum
DAT. rēbus diēbus -ēbus
ACC. rēs diēs ēs
ABL. rēbus diēbus -ēbus

Gender in the Fifth Declension

97. All nouns of the Fifth Declension are Feminine, except diēs (usually M.), day, and merīdiēs (M.), noon.

a. Diēs is sometimes feminine in the singular, especially in phrases indicating a fixed time, and regularly feminine when used of time in general: as, cōnstitūtā diē, on a set day; longa diēs, a long time.

Case-Forms in the Fifth Declension

98. The following peculiarities require notice:—

a. Of nouns of the fifth declension, only diēs and rēs are declined throughout. Most want the plural, which is, however, found in the nominative or accusative in aciēs , effigiēs, ēluviēs, faciēs , glaciēs , seriēs, speciēs, spēs .1

b. The Locative form of this declension ends in -ē. It is found only in certain adverbs and expressions of time:—

hodiē, to-day; diē quārtō (old, quārtī ), the fourth day;
perendiē, day after to-morrow; prīdiē, the day before.

c. The fifth declension is closely related to the first, and several nouns have forms of both: as, māteria , -iēs; saevitia , -iēs. The genitive and dative in -ēī are rarely found in these words.

d. Some nouns vary between the fifth and the third declension: as, requiēs , satiēs (also satiās , genitive -ātis), plēbēs (also plēbs, genitive plēbis), famēs, genitive famis , ablative famē.

Note.--In the genitive and dative -ēī (-ĕī) was sometimes contracted into -ei : as, tribūnus plēbei , tribune of the people ( plēbēs ). Genitives in -ī and -ē also occur: as, “ diī (Aen. 1.636) , plēbī-scītum, “ aciē (B. G. 2.23) . A few examples of the old genitive in -ēs are found (cf. -ās in the first declension, § 43. b). The dative has rarely -ē, and a form in -ī is cited.

1 The forms faciērum , speciērum , speciēbus , spērum , spēbus , are cited by grammarians, also spērēs , spēribus, and some of these occur in late authors.

hide References (2 total)
  • Cross-references in notes from this page (2):
    • Caesar, Gallic War, 2.23
    • Vergil, Aeneid, 1.636
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