I'm not sure

A common way to express uncertainty.

Use 'متأكدًا' for masculine speakers and 'متأكدة' for feminine speakers; 'لا أعرف' is a more casual alternative.

A polite and common way to express uncertainty; 'আমি জানি না' is a more casual alternative.

A very common and versatile phrase.

Use 'jistý' for masculine speakers and 'jistá' for feminine speakers; 'Nevím' is a more casual alternative.

A polite and common way to express uncertainty; 'Jeg ved ikke' is a more casual alternative.

A very common and polite way to express uncertainty.

Use 'σίγουρος' for masculine speakers and 'σίγουρη' for feminine speakers; 'Δεν ξέρω' is a more casual alternative.

Use 'seguro' for masculine speakers and 'segura' for feminine speakers; 'No sé' is a more casual alternative.

A polite and common way to express uncertainty; 'Ma ei tea' is a more casual alternative.

A very common and versatile phrase.

A polite and common way to express uncertainty; 'نمی‌دانم' is a more casual alternative.

A polite and common way to express uncertainty; 'En tiedä' is a more casual alternative.

Use 'sûr' for masculine speakers and 'sûre' for feminine speakers; 'Je sais pas' is very common.

A very common and versatile phrase.

A polite and common way to express uncertainty; 'મને ખબર નથી' is a more casual alternative.

A polite and common way to express uncertainty; 'Ban sani ba' is a more casual alternative.

Use 'בטוח' for masculine speakers and 'בטוחה' for feminine speakers; 'אני לא יודע/ת' is a more casual alternative.

A polite and common way to express uncertainty; 'मुझे नहीं पता' is a more casual alternative.

A polite and common way to express uncertainty; 'Nem tudom' is a more casual alternative.

A polite and common way to express uncertainty; 'Saya tidak tahu' is a more casual alternative.

Use 'viss' for masculine speakers and 'viss um það' is a more formal way to say 'I'm not sure about that'. 'Ég veit það ekki' is a more casual alternative.

Use 'sicuro' for masculine speakers and 'sicura' for feminine speakers; 'Non lo so' is a more casual option.

A very polite and common way to express uncertainty.

A polite and common way to express uncertainty; '몰라' is a more casual alternative.

Use 'tikras' for masculine speakers and 'tikra' for feminine speakers; 'Aš nežinau' is a more casual alternative.

Use 'pārliecināts' for masculine speakers and 'pārliecināta' for feminine speakers; 'Es nezinu' is a more casual alternative.

A polite and common way to express uncertainty; 'मला माहित नाही' is a more casual alternative.

A polite and common way to express uncertainty; 'Saya tidak tahu' is a more casual alternative.

A straightforward and common phrase.

A polite and common way to express uncertainty; 'Jeg vet ikke' is a more casual alternative.

A polite and common way to express uncertainty; 'ਮੈਨੂੰ ਨਹੀਂ ਪਤਾ' is a more casual alternative.

Use 'pewien' for masculine speakers and 'pewna' for feminine speakers; 'Nie wiem' is a more casual option.

A polite and common way to express uncertainty; 'Não sei' is a more casual alternative.

Use 'sigur' for masculine speakers and 'sigură' for feminine speakers; 'Nu știu' is a more casual alternative.

Use 'уверен' for masculine speakers and 'уверена' for feminine speakers; 'Не знаю' is a more casual alternative.

A polite and common way to express uncertainty; 'Jag vet inte' is a more casual alternative.

A very common and versatile phrase, also meaning 'I don't know'.

A polite and common way to express uncertainty; 'தெரியாது' is a more casual alternative.

A polite and common way to express uncertainty; 'నాకు తెలీదు' is a more casual alternative.

A polite and common way to express uncertainty; 'ไม่รู้' is a more casual alternative.

A polite and common way to express uncertainty; 'Hindi ko alam' is a more casual alternative.

A common and polite way to express uncertainty.

Use 'впевнений' for masculine speakers and 'впевнена' for feminine speakers; 'Я не знаю' is a more casual alternative.

A polite and common way to express uncertainty; 'مجھے نہیں پتہ' is a more casual alternative.

A polite and common way to express uncertainty; 'Tôi không biết' is a more casual alternative.

A polite and common way to express uncertainty; 'Mi ò mọ̀' is a more casual alternative.

A common and polite way to express uncertainty; '我不知道' is a more casual alternative.

A common and polite way to express uncertainty; '我唔知' is a more casual alternative.

A very common and versatile phrase, also meaning 'I don't know'.