Ukrainian : Новоград-Волинський , translit . : Novohrad-Volyns’kyi ; Russian : Новоград-Волынский , translit. : Novograd-Volynsky ; Yiddish : זוויל t ranslit . Zvil ; Polish : Zwiahel ) is a city in the Zhytomyr Oblast ( province ) of northern Ukraine . Serving as the administrative center of the Novohrad-Volynskyi