The question requires us to match certain Tamil words with their corresponding English meanings. Let's examine these terms individually:

1. சாந்து (Shanthu): The term refers to something like 'coolness' or 'calmness', typically represented as 'அரை' meaning 'half'. However, it more contextually means 'reduction' or 'diminishment' and is often referred to as "arivu" or 'coolness'). It fits the match with option 4.
2. குருவி (Kuruvi): This translates to 'sparrow' in English. A sparrow is small and typically associated with something like 'protection or covering', which culturally can be akin to 'umbrella' or 'shade', represented by 'குடை'. Hence, it matches with option 2.
3. சுனை (Sunai): This refers to a 'spring' or 'source of water'. A spring typically results from 'flowing' or 'downfall', which matches with the term 'இழிதல்'. Hence, it associates with option 1.
4. அருவி (Aruvi): This term means 'waterfall'. A waterfall can often be perceived as 'comparison' in terms of its grandeur, thereby connecting with 'ஒப்பு'. Thus, it matches with option 3.

Based on this analysis, the correct matching is as follows:

Thus, the correct answer is the option sequence \(4\ 2\ 1\ 3\), which is option 4 2 1 3.