Noun reference

бой

battle, fight, combat

Masculine · Inanimate

Masculine -й · Special pattern

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 бой
Case	Singular	Plural
Nominative	бой	бои
Accusative	бой	бои
Genitive	боя	боёв
Dative	бою	боям
Instrumental	боем	боями
Prepositional	боеLocative/fixed-expression variant: бою Accepted in practice	боях

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.

Nominative · Plural бой → бои

This form belongs to a reviewed special pattern, so it is shown as a stored form rather than a guessed suffix swap.

Show all case-build notes

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

Nominative · Plural бой → бои This form belongs to a reviewed special pattern, so it is shown as a stored form rather than a guessed suffix swap.

Accusative · Singular бой → бой This form belongs to a reviewed special pattern, so it is shown as a stored form rather than a guessed suffix swap.

Accusative · Plural бой → бои This form belongs to a reviewed special pattern, so it is shown as a stored form rather than a guessed suffix swap.

Genitive · Singular бой → боя This form belongs to a reviewed special pattern, so it is shown as a stored form rather than a guessed suffix swap.

Genitive · Plural бой → боёв This form belongs to a reviewed special pattern, so it is shown as a stored form rather than a guessed suffix swap.

Dative · Singular бой → бою This form belongs to a reviewed special pattern, so it is shown as a stored form rather than a guessed suffix swap.

Dative · Plural бой → боям This form belongs to a reviewed special pattern, so it is shown as a stored form rather than a guessed suffix swap.

Instrumental · Singular бой → боем This form belongs to a reviewed special pattern, so it is shown as a stored form rather than a guessed suffix swap.

Instrumental · Plural бой → боями This form belongs to a reviewed special pattern, so it is shown as a stored form rather than a guessed suffix swap.

Prepositional · Singular бой → бое This form belongs to a reviewed special pattern, so it is shown as a stored form rather than a guessed suffix swap.

Prepositional · Plural бой → боях This form belongs to a reviewed special pattern, so it is shown as a stored form rather than a guessed suffix swap.