sambādhana : [nt.] obstruction.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

sam-ḍbādhana n. (only L.) compressing, obstructing, opposing
• a barrier, gate
• the female organ
• a door keeper
• the point of a stake or spit
• (ā), f. rubbing, chafing Siṃhâs

Sanskrit-English Dictionary, by M. Monier William