sulfurous/ʹsulf(ə)rəs, sulʹfyooerəs/ adj

• undead
• undecagon
• undeceive
• undecidable
• undecided
• undemanding
• undemocratic
• undemonstrative
• undeniable
• under
• under-
• underachieve
• under a cloud
• underact
• under-age
• underarm
• under arms
• under arrest
• underbelly
• underbid
• underbite
• underbody
• underbred
• underbrush
• under canvas