筆直

笔直
bǐzhí
  1. perfectly straight
  2. straight as a ramrod
  3. bolt upright

CEDICT

straight (not crooked or bent)

Wiktionary

像筆桿一樣直，形容很直的意思。

重編國語辭典

Entry Composition

1 筆 bǐ
  1. brushstroke; stroke (in painting or calligraphy)
  2. (bound form) style of writing; literary manner; technique of brushwork
  3. (classifier) stroke of a Chinese character
  4. (classifier) sum of money; financial transaction; piece of business
  5. (literary) to write (with a brush or pen)

classifiers: 支, 枝
2 直 zhí
  1. straight
  2. to straighten
  3. fair and reasonable
  4. frank
  5. straightforward
  6. (indicates continuing motion or action)
  7. vertical
  8. vertical downward stroke in Chinese characters

Related entries

筆挺 bǐtǐng
  1. (standing) very straight
  2. straight as a ramrod
  3. bolt upright
  4. well-ironed
  5. trim