牢固
láogù
firm; secure; solid
Every meaning
láogù
- firm; secure; solid
Its characters
- 牢láofirm; secure
- 固gùsolid; firm (as in 坚固, 固体)
Words with 牢
Words with 固
Meanings are from Mandarin The Wild’s own dictionary. Levels follow the official HSK word list (the exam’s 2025 syllabus, levels 7–9 shown together).