''Nepostojano a'' (movable, or fleeting 'a' ) with adjectives :

Masculine - Feminine - Neuter

... čovek (man) - ... žena (woman) - ... dete (child)

dobar čovek - dobra žena - dobro dete (good)

hitar - hitra - hitro (fast)

čudan - čudna - čudno (funny, strange)

važan - važna - važno (important)

ogroman - ogromna - ogromno (huge, enormous)

tanak - tanka - tanko (thin)

šupalj - šuplja - šuplje (hollow)


šuplje drvo