指纹 (zhǐ wén): fingerprint; the arches, loops and whorls on the fingers

The police found a clear fingerprint on the glass, which became a key clue in solving the case.

Many smartphones now support fingerprint unlocking, which is both convenient and secure.

When entering the country, the staff asked me to record my fingerprints for faster customs clearance.

Although the scene was severely damaged, the forensic experts still extracted the suspect's fingerprints from the door handle.

Everyone's fingerprints are unique, so they are often used as a basis for identification.