immersion

/ɪˈmɜːʃn इˈमश्‌न्‌/ noun [U]

1 immersion (in something) the act of putting somebody/something into a liquid so that he/she/it is completely covered; the state of being completely covered by a liquid किसी वस्‍तु को द्रव में पूरी तरह डुबा देने की क्रिया; द्रव में पूरी तरह डूबे होने की स्थिति; निमज्‍जन, डुबकी

Immersion in cold water resulted in rapid loss of heat.

2 immersion (in something) the state of being completely involved in something (किसी काम में) पूरी तल्‍लीनता, पूर्ण ध्यानमग्‍नता

a two-week immersion course in French [in which the student hears and uses only French]