Definition of indissoluble adjective from the Oxford Advanced Learner's Dictionary

 

indissoluble

 adjective
adjective
BrE BrE//ˌɪndɪˈsɒljəbl//
 
; NAmE NAmE//ˌɪndɪˈsɑːljəbl//
 
(formal)
 
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(of a relationship) that cannot be ended an indissoluble friendship Word Origin late 15th cent.: from Latin indissolubilis, from in- ‘not’ + dissolubilis (from the verb dissolvere, from dis- ‘apart’ + solvere ‘loosen or solve’).
See the Oxford Advanced American Dictionary entry: indissoluble