indissoluble
adjective /ˌɪndɪˈsɒljəbl/
/ˌɪndɪˈsɑːljəbl/
(formal)- (of a relationship) that cannot be ended
- an indissoluble friendship
Word Originlate 15th cent.: from Latin indissolubilis, from in- ‘not’ + dissolubilis (from the verb dissolvere, from dis- ‘apart’ + solvere ‘loosen or solve’).