1. （蛋）煮得老的，煮硬的
A hard-boiled egg has been boiled in its shell until the whole of the inside is solid.
2. （人）不动感情的，强硬的
You use hard-boiled to describe someone who is tough and does not show much emotion.
e.g. She's hard-boiled, tough and funny.
她冷峻、坚韧而风趣。
adj
1. (eggs) cooked until the yolk is solid
2. used of persons
emotionally hardened
e.g. faced a case-hardened judge
Synonym: case-hardened hardened
3. tough and callous by virtue of experience
Synonym: hard-bitten pugnacious