The middle radical of this word is guttural; this affects the adjacent vowels.
Singular
Plural
Masculine
Feminine
Masculine
Feminine
גַּעְשִׁי
ga'ashi
volcanic
גַּעְשִׁית
ga'ashit
volcanic
גַּעְשִׁיִּים
ga'ashiyim
volcanic
גַּעְשִׁיּוֹת
ga'ashiyot
volcanic
Singular
Masculine
גַּעְשִׁי
ga'ashi
volcanic
Feminine
גַּעְשִׁית
ga'ashit
volcanic
Plural
Masculine
גַּעְשִׁיִּים
ga'ashiyim
volcanic
Feminine
גַּעְשִׁיּוֹת
ga'ashiyot
volcanic
