This is the 557th most frequent Japanese word.
わ
The Japanese particle "わ" expresses emphasis, emotion, or femininity at the end of a sentence, commonly used in casual and feminine speech.
Here, "わ" is part of the pronoun "わたし" meaning "I". This is unrelated to its use as a particle.
わたしは学生です。
I am a student.
Here, "わ" is used as an interjection, often extended to express surprise or amazement, as in "わあ".
わあ、すごい！
Wow, amazing!
In this sentence, "わ" is a sentence-ending particle commonly used in informal speech, especially among women, to express mild emphasis and personal emotion.