This is the 199th most frequent Thai word.
ฝ
The Thai letter "ฝ" (fo fa) is the 34th consonant of the Thai alphabet.
In this sentence, 'ฝน' means 'rain' and refers to the natural precipitation.
ฝนกำลังตก
It is raining.
Here, 'ฝึก' means 'to practice' and implies an action of improving skill.
อย่าลืมฝึกซ้อมก่อนการแข่งขัน
Don't forget to practice before the competition.
In this usage, 'ฝัก' refers to 'pods', indicating part of a plant.