बिना संदेह या शक के।

मैं यह काम बेशक कर सकता हूँ।
अभरम, अलबत्ता, अवश्य, अवश्यमेव, अवसि, अवितर्किक, असंदेह, असंशय, असन्देह, इकंक, जरूर, ज़रूर, निःसंदेह, निःसन्देह, निश्चिततः, निसंदेह, निसन्देह, निस्संदेह, निस्सन्देह, बाशिन्दा, बिना शक, बिलकुल, बिलाशक, बिल्कुल, बेशक, यक़ीनन, यकीनन, वाशिन्दा

निश्चित रूप से।

यह काम आज अवश्य होना चाहिए।
अवश्य, जरूर, ज़रूर, पक्का

Definitely or positively (`sure' is sometimes used informally for `surely').

The results are surely encouraging.
She certainly is a hard worker.
It's going to be a good day for sure.
They are coming, for certain.
They thought he had been killed sure enough.
He'll win sure as shooting.
They sure smell good.
Sure he'll come.
certainly, for certain, for sure, sure, sure as shooting, sure enough, surely