inknoun [ C or U ]uk /ɪŋk/ us /ɪŋk/
ink noun [ C or U ] (LIQUID)
a bottle of ink 一瓶墨水
Please write in ink, not in pencil. 书写请用墨水笔，不要用铅笔。
- She was disappointed to see her essay returned with a mass of corrections in red ink.
- When you fill in the form, please write clearly in black ink.