What is the meaning of the pali word "Viveko"?

I was reading through some Suttas and a word solitude was found. I looked up the original pali sutta for the word and found that word "Viveko" is getting translated as solitude. I have a sanskrit background and I studied sanskrit when I was in 8th standard. The word Viveko seems to have been derived from the sanskrit word vivek. Vivek means discretion , wisdom , true knowledge,investigation , consideration etc..but it does not mean solitude.(Solitude means privacy) Here is the sutta which uses the word solitude : > Two thoughts occur to him, The Tathāgata, the Awakened One Who endured > what is beyond endurance: Security (for beings) was the first thought > spoken of, **Solitude** was the second announced. Its pali version is as follows : > “Tathāgataṃ buddhamasayhasāhinaṃ, Duve vitakkā samudācaranti naṃ; > Khemo vitakko paṭhamo udīrito, Tato **viveko** dutiyo pakāsito. My question is : What is the meaning of the pali word "Viveko" ?