transcription, транскрипция: [ ˌsi-ni-ˌkwä-ˈnän, -ˈnōn also ]
ˌsē-; also ˌsī-ni-ˌkwā-ˈnän noun
( plural sine qua nons also sine qui·bus non -ˌkwi-(ˌ)bu̇s- also -ˌkwī-)
Etymology: Late Latin, without which not
Date: 1602
: something absolutely indispensable or essential
reliability is a sine qua non for success