gen. istīus (the poets often make the penult of the gen.

http://lila-erc.eu/data/lexicalResources/LewisShort/id/LexicalSense/n25082.0 an entity of type: LexicalSense

gen. istīus (the poets often make the penult of the gen. 
gen. istīus (the poets often make the penult of the gen. 

data from the linked data cloud