筋骨 (jīn gǔ) — (literally) muscles and bones, the musculoskeletal system; physical strength, stamina, energy; courage, moral fiber, inner backbone

Definition

Examples

• 老人每天锻炼筋骨，身体很硬朗。
  Lǎo rén měi tiān duàn liàn jīn gǔ, shēn tǐ hěn yìng lǎng.
  The elderly person exercises their muscles and bones every day, so their body is very robust.
• 这场马拉松对大家的筋骨是个大考验。
  Zhè chǎng mǎ lā sōng duì dà jiā de jīn gǔ shì gè dà kǎo yàn.
  This marathon is a big test of everyone's stamina and physical endurance.
• 他虽然不是最强壮的，但筋骨硬，从不轻易放弃。
  Tā suī rán bú shì zuì qiáng zhuàng de, dàn jīn gǔ yìng, cóng bù qīng yì fàng qì.
  He may not be the strongest, but he has moral fiber and never gives up easily.