泳ぐ, 游ぐ, およぐ
Godan verb, Intransitive
1. to swim
2. to struggle through (a crowd)
3. to make one's way through the world, to get along (in life)
4. to totter, to lose one's balance
この湖で泳ぐのは危険だと思うんだ。
が
Particle
1. indicates the subject of a sentence
literary in modern Japanese; usu. written as ヶ in place names
2. indicates possession
Conjunction
3. but, however, (and) yet, though, although, while
4. and
5. used after an introductory remark or explanation