Tra từ salt mine - Từ điển WordNet v3.1

Từ điển WordNet v3.1 - WordNet Dictionary

salt mine

noun

1. a mine where salt is dug
• Hypernyms:
mine
2. a job involving drudgery and confinement
• Syn:
treadmill
• Hypernyms:
occupation, business, job, line of work, line