In many languages, the dictionary form has a fixed ending — in Japanese, it ends with a character from the u-row.
Literal
Many languages [in-で] dictionary-form [possessive-の] ending [subject-が] decided-[progressive-ており], Japanese [in-では] u-row [possessive-の] character [with-で] end.
辞書形 'dictionary form' — the base/citation form of a verb. う段 'the u-row' of the Japanese kana chart (う, く, す, つ, ぬ, ふ, む, る). A cross-linguistic observation about verb citation forms — useful for learners understanding how Japanese verbs are organized.