Definition of unpassable in English:

unpassable

Syllabification: un·pass·a·ble
Pronunciation: /ˌənˈpasəbəl
 
/

adjective

Impossible to travel along or over; impassable: some roads are completely unpassable because of flood waters

Definition of unpassable in:

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Word of the day flippant
Pronunciation: ˈflɪp(ə)nt
adjective
not showing a serious or respectful attitude