1. Being sour to the taste
   - acidic, acid, acidulent

See also: acidulousness, sour

• insertion
• insertional mutagenesis
• Insessores
• inset
• inshallah
• inshore
• inside
• inside caliper
• inside clinch
• inside information
• inside job
• inside leg
• inside loop
• Inside Passage
• inside track
• inside-out
• insider
• witch-hazel family
• witch-hunt
• witch-hunter
• witchcraft
• witchery
• witches' brew
• witches' broom
• witches' broth