\font\SILmfont={[/usr/local/texlive/texmf-local/fonts/truetype/Google/NotoSerifTamil/NotoSerifTamil_SemiCondensed-ExtraLight.ttf]:+clig;+liga;+tlig}\SILmfont
\def\SILmfontname{Noto Serif Tamil SemiCondensed ExtraLight}%