Noun reference

болезнь

illness, sickness, disease

Feminine · Inanimate

Feminine soft sign

Case paradigm

Singular and plural together

Compare each case across both numbers. The forms below are the noun's stored reference paradigm.

Singular and plural case forms for болезнь
Case	Singular	Plural
Nominative	болезнь	болезни
Accusative	болезнь	болезни
Genitive	болезни	болезней
Dative	болезни	болезням
Instrumental	болезнью	болезнями
Prepositional	болезни	болезнях

Form pattern

How the forms are built

The paradigm above is authoritative. These notes expose a transparent ending change only when the stored declension family supports one.

Genitive · Singular болезнь → болезни

The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Show all case-build notes

Nominative · Singular болезнь This is the dictionary form used to identify the noun.

Nominative · Plural болезнь → болезни The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Accusative · Singular болезнь → болезнь The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Accusative · Plural болезнь → болезни The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Genitive · Singular болезнь → болезни The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Genitive · Plural болезнь → болезней The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Dative · Singular болезнь → болезни The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Dative · Plural болезнь → болезням The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Instrumental · Singular болезнь → болезнью The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Instrumental · Plural болезнь → болезнями The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Prepositional · Singular болезнь → болезни The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.

Prepositional · Plural болезнь → болезнях The reviewed declension family controls this spelling. Use the stored form rather than removing the last letter mechanically.