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impregnable bolgárul

AngolBolgár
impregnable (too strong to be defeated or overcome, see also: invincible)
adjective
[UK: ɪm.ˈpreɡ.nəb.l̩]
[US: ˌɪm.ˈpreɡ.nəb.l̩]

непревзимаемadjective