Tool
noun
The tools you use on the road of life are important to have. What is your most important tool?
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
手紙を送るには、ペンや紙などの道具を使います。
To send a letter, you use tools like a pen or paper.
それは科学実験ための道具です。
It is a tool for scientific experiments.
明日の工事に必要な道具は全て有りますか？
Do you have all the tools that you need for tomorrow's construction?