たし確tashiかめるkameru
1.
To verify the truth or accuracy of something through direct observation or investigation.
2.
To confirm information or details by checking or cross-referencing with reliable sources.
3.
To ensure clarity and understanding by asking questions or seeking further information.
4.
To establish certainty about a situation or fact by investigating or questioning.
Example:
窓が閉まっているか確かめとけ。