| English | Russian |
| be intended as singular or plural | употребляться в единственном или во множественном числе (To distinguish between singular and plural in cases, where the word remains the same, you need to rely on the context of the sentence, including the surrounding words such as verbs and determiners, which can indicate whether the noun is intended as singular or plural. Alex_Odeychuk) |
| part of the word which changes at its declination or conjugation | часть слова, которая изменяется при его склонении или спряжении (ssn) |
| part of the word which remains unchanged at its declination or conjugation | часть слова, которая остаётся неизменной при его склонении или спряжении (ssn) |