1. Lose one's emotional or mental composure
   - fall apart, go to pieces

Type of: break down, lose it, snap

• Wynnea sparassoides
• Wyoming
• Wyomingite
• Wyrd
• WYSIWYG
• Wystan Hugh Auden
• Wyszynski
• Wytensin
• wyvern
• x
• X chromosome
• X factor
• x-axis
• X-linked
• X-linked dominant inheritance
• X-linked gene
• X-linked recessive inheritance
• X-linked SCID
• X-OR circuit
• X-radiation
• X-rated
• x-ray
• X-ray astronomy
• X-ray crystallography
• X-ray diffraction