This is the 223rd most frequent Thai word.
ทางด
It seems there might be a typo in the word "ทางด". If you meant "ทาง", it means "way", "path", or "direction" in English. If it is another word, please clarify.
In this sentence, 'ทางด' is used to mean a route or pathway.
ทางดนี้สั้นกว่าอีกทางหนึ่ง.
This route is shorter than the other one.
Here, 'ทางด' represents a figurative pathway or choice.
เขาต้องเลือกทางดที่จะทำให้มีความสุข.
He has to choose the path that will bring him happiness.
In this usage, 'ทางด' denotes a decision or course of action metaphorically.