indispensable, essential 
unverzichtbar 
indispensabile 
indispensable 
indispensable indispensable, essential 3 必不可少 [-] bìbukěshǎo (must-not-can-lack) indispensable, essential: ~的内容necessary contents || ~的条件essential conditions '| Goethebuch | Vietnamese |
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| Oxford3000Ten |
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| GLOSSIKA |
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