poser, stumper, toughie, sticker
(noun) a particularly difficult or baffling question or problem
hood, hoodlum, goon, punk, thug, tough, toughie, strong-armer
(noun) an aggressive and violent young criminal
Source: WordNet® 3.1
toughie (plural toughies)
(informal) Something that is tough, or difficult.
Source: Wiktionary
12 June 2025
(noun) a decrease in the density of something; “a sound wave causes periodic rarefactions in its medium”
Decaffeinated coffee is not caffeine-free. Studies from the National Institute of Health (US) have shown that virtually all decaf coffee types contain caffeine. A 236-ml (8-oz) cup of decaf coffee contains up to 7 mg of caffeine, whereas a regular cup provided 70-140 mg.
