R. Torceanu, A Simplified Grammar of the Roumanian Language (1883)
“ But there are greater difficulties than these with which we have to deal. There are in the Roumanian language nouns which though masculine in the singular become feminine in the plural. This plural ends in e or urĭ: palat, ‘palace;’ palate, ‘palaces.’ pod, ‘bridge;’ podurĭ, ‘bridges.’ folos, ‘advantage;’ folósse, ‘advantages.’ Many nouns belong to this class, and they can be learnt only by long practice. To sum up what has already been said:—Masculine nouns generally end with a consonant; there are a few exceptions which end in e, ŭ, ĭ, and ă. All masculine nouns end in ĭ in the plural. ”
