més-

• mé- (before a consonant)
• mes- (obsolete, until 18th century; was used before vowels as well as consonants)

Inherited from Middle French mes-, from Old French mes- (“badly, wrongly”), from Frankish *missa-, from Proto-Germanic *missa- (“divergent, amiss, astay”), ultimately from Proto-Indo-European *mey-t(h₂)- (“to swap, exchange”). Akin to Old English mis- (“mis-”), Gothic 𐌼𐌹𐍃𐍃𐌰- (missa-), Old High German missa- (“mis-”). More at mis-.

• IPA^(key): /mez/

més-

1. (before a vowel) mis- (badly, wrongly)

   ‎més- + ‎estimer → ‎mésestimer

• Before a consonant the form mé- is used.