If in doubt about ie or ei, if the seem of the vowel is as in brief /i:/, we spell it ie; but once the letter c, we spell it ei: … humorous - Folks usually go away out the 2nd "o," improperly believing that only the "u" is needed https://dsllearning69370.alltdesign.com/little-known-facts-about-spelling-rules-in-hindi-47996029