What does 唯一 mean?
唯一 is a Japanese noun meaning “only, sole, unique” in English. It is written as 唯一 in kanji, ゆいいつ in hiragana, and yuiitsu in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
初めの一歩が唯一の難関。
The first step is the hardest.