mawkish: [17] The underlying meaning of mawkish is ‘maggotish’. It was derived from a now obsolete word mawk, which meant literally ‘maggot’ but was used figuratively (like maggot itself) for a ‘whim’ or ‘fastidious fancy’. Hence mawkish originally meant ‘nauseated, as if repelled by something one is too fastidious to eat’. In the 18th century the notion of ‘sickness’ or ‘sickliness’ produced the present-day sense ‘over-sentimental’. Mawk itself went back to a Middle English mathek ‘maggot’ (possible source of maggot [14]), which was borrowed from Old Norse mathkr. => maggot[mawkish etymology, mawkish origin, 英语词源]
1660s, "sickly, nauseated," from Middle English mawke "maggot" (see maggot). Sense of "sickly sentimental" is first recorded 1702. Related: Mawkishly; mawkishness.