Most kanji have more than one reading, and the word decides which one.
strong, force
The Jōyō Kanji table lists 6 readings for 強. Which one you use depends on the word it sits in, so learn the words below and the reading comes with them.
| Word | Reading | Type | Meaning |
|---|---|---|---|
| 勉強 | べんきょうbenkyou | On | study |
| 強化 | きょうかkyouka | On | strengthening |
| 強引 | ごういんgouin | On | pushy, forcible |
| 強盗 | ごうとうgoutou | On | robbery |
| 強い | つよいtsuyoi | Kun | strong |
| 強まる | つよまるtsuyomaru | Kun | to get stronger |
| 強める | つよめるtsuyomeru | Kun | to strengthen |
| 強いる | しいるshiiru | Kun | to force |
Seen in JapanFan, air conditioner and microwave buttons: 強 (kyou, strong), 中 (chuu), 弱 (jaku, weak).
Other kanji with many readings
Kanji came to Japan from China over several centuries. Each wave brought the Chinese pronunciation of its time and place, and Japanese kept the older sounds alongside the newer ones. Those borrowed sounds are the on'yomi. For example, 生 is セイ in 先生 but ショウ in 一生. Japanese also attached its own native words to the characters, and those are the kun'yomi.
Sounds also shift when words join: ひ becomes び in 日曜日, ひと becomes びと in 人々, and ふん becomes ぷん in 三分. That is why the readings listed in a dictionary don't always match what you hear.