Contiguous (कन्टिग्यूअस) adjective
Contiguous means touching or sharing a common border, or close together without any gap (सटा हुआ / जुड़ा हुआ / एक साथ लगा हुआ)
India and Nepal are contiguous countries. (भारत और नेपाल सटे हुए देश हैं।)
The hotel has three contiguous buildings. (होटल की तीन आपस में जुड़ी हुई इमारतें हैं।)
Contagious (कन्टेजस) adjective
Contagious means spreading by contact, especially a disease or emotion that can easily pass from one person to another. It refers to something that can spread — like infection, laughter, or enthusiasm. (संक्रामक / फैलने वाला (रोग या भावना)
COVID-19 is a contagious disease. (कोविड-19 एक संक्रामक रोग है।)
Her laughter was so contagious that everyone started laughing. (उसकी हँसी इतनी संक्रामक थी कि सब हँसने लगे।)