“straight / to fix” in Japanese is 直, read choku, jiki, nao (ちょく, じき, なお, ただ). It is a Grade 2 Kyōiku kanji, taught in year 2 of Japanese elementary school, and appears in words such as 直接 (direct).
What does 直 mean?
まちがいを直す。
Same sound, different character — the classic trap. Compare them side by side: