From Russian большеви́к (bolʹševík) + -ach (adjectival suffix), with the Irish suffix replacing the Russian one.
Boilséiveach (genitive singular masculine Boilséivigh, genitive singular feminine Boilséiví, plural Boilséiveacha, not comparable)
| Singular | Plural (m/f) | |||
|---|---|---|---|---|
| Positive | Masculine | Feminine | (strong noun) | (weak noun) |
| Nominative | Boilséiveach | Bhoilséiveach | Boilséiveacha; Bhoilséiveacha² | |
| Vocative | Bhoilséivigh | Boilséiveacha | ||
| Genitive | Boilséiví | Boilséiveacha | Boilséiveach | |
| Dative | Boilséiveach; Bhoilséiveach¹ |
Bhoilséiveach; Bhoilséivigh (archaic) |
Boilséiveacha; Bhoilséiveacha² | |
| Comparative | níos Boilséiví | |||
| Superlative | is Boilséiví | |||
¹ When the preceding noun is lenited and governed by the definite article.
² When the preceding noun ends in a slender consonant.
Boilséiveach m (genitive singular Boilséivigh, nominative plural Boilséivigh)
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Bare forms:
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Forms with the definite article:
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| Irish mutation | ||
|---|---|---|
| Radical | Lenition | Eclipsis |
| Boilséiveach | Bhoilséiveach | mBoilséiveach |
| Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs. | ||