lengthening

Từ điển WordNet v3.1 - WordNet Dictionary

noun

the act of prolonging something (Freq. 1)
- there was an indefinite prolongation of the peace talks
• Syn:
prolongation, protraction, perpetuation
• Derivationally related forms:
perpetuate (for: perpetuation), protract (for: protraction), prolong (for: prolongation)
• Hypernyms:
continuance, continuation