The correct reading ていけつ uses standard On'yomi. 締 (テイ) means to tie/bind, and 結 (ケツ) means to conclude. This term refers to the formal act of concluding, signing, and establishing an agreement, such as a treaty or contract, making it legally binding.

正しい読みは「ていけつ」で、両方とも音読みです。「締」は結ぶ、「結」は結びを意味します。条約や契約などの文書を正式に結び、効力を持たせる行為、またはその完了を指します。