Antonyms of adj snot-nosed

2 senses of snot-nosed

Sense 1
bigheaded, persnickety, snooty, snot-nosed, snotty, stuck-up, too big for one's breeches, uppish -- ((used colloquially) overly conceited or arrogant; "a snotty little scion of a degenerate family"-Laurent Le Sage; "they're snobs--stuck-up and uppity and persnickety")

INDIRECT (VIA proud) -> humble -- (marked by meekness or modesty; not arrogant or prideful; "a humble apology"; "essentially humble...and self-effacing, he achieved the highest formal honors and distinctions"- B.K.Malinowski)

Sense 2
snotty, snot-nosed -- (dirty with nasal discharge; "a snotty nose"; "a house full of snot-nosed kids")

INDIRECT (VIA dirty) -> clean -- (free from dirt or impurities; or having clean habits; "children with clean shining faces"; "clean white shirts"; "clean dishes"; "a spotlessly clean house"; "cats are clean animals")

Similarity of adj snot-nosed

2 senses of snot-nosed

Sense 1
bigheaded, persnickety, snooty, snot-nosed, snotty, stuck-up, too big for one's breeches, uppish -- ((used colloquially) overly conceited or arrogant; "a snotty little scion of a degenerate family"-Laurent Le Sage; "they're snobs--stuck-up and uppity and persnickety")
       => proud (vs. humble) -- (feeling self-respect or pleasure in something by which you measure your self-worth; or being a reason for pride; "proud parents"; "proud of his accomplishments"; "a proud moment"; "proud to serve his country"; "a proud name"; "proud princes")

Sense 2
snotty, snot-nosed -- (dirty with nasal discharge; "a snotty nose"; "a house full of snot-nosed kids")
       => dirty (vs. clean), soiled, unclean -- (soiled or likely to soil with dirt or grime; "dirty unswept sidewalks"; "a child in dirty overalls"; "dirty slums"; "piles of dirty dishes"; "put his dirty feet on the clean sheet"; "wore an unclean shirt"; "mining is a dirty job"; "Cinderella did the dirty work while her sisters preened themselves")