frosty 
/ˈfrɑ:sti/ adjective
frost·i·er; frost·i·est /ˈfrɑ:sti/ adjective 1 : cold enough to produce frost
▪ a frosty night 2 : covered with frost
▪ frosty windows 3 : unfriendly or cold
▪ a frosty stare ▪ We received a frosty welcome.
▪ a frosty night
▪ frosty windows
▪ a frosty stare ▪ We received a frosty welcome.
— frost·i·ly /ˈfrɑ:stəli/ adverb
▪ She was glaring frostily at us.
/ˈfrɑ:stəli/ adverb ▪ She was glaring frostily at us.
— frost·i·ness noun [noncount]
▪ There's some frostiness [=coolness] between them. ▪ the frostiness of the night
▪ There's some frostiness [=coolness] between them. ▪ the frostiness of the night
