If doubtful about ie or ei, if the audio of the vowel is as Briefly /i:/, we spell it ie; but following the letter c, we spell it ei: … is shortened to gentleman and ouevre is shortened to euver. Which is the place the spelling of maneuver emanates from. https://cashquxgh.blog-a-story.com/7870245/spelling-mistake-dharmendra-sir-no-further-a-mystery