moving a finger gradually in order to "glide" from one tone to another

Huáyīn - Chinese

Portamento - Galego

Portamiento [?] - Spanish (Castilian)

Slide-fingering - English

Te-utsuri - Japanese

·? (performance: slide-fingering [Term not mentioned in available sources]) - French

·? (performance: slide-fingering [Term not mentioned in available sources]) - German