Mesopotamian/ˌmesəpəʹtaymi·ən/ noun

• inheritance tax
• inhibit
• inhibiter
• inhibition
• inhibitor
• in high dudgeon
• in hock
• in holes
• in honour bound
• in honour of
• inhospitable
• inhospitality
• in hot water
• in-house
• inhuman
• inhumane
• inhumanity
• inhume
• in hysterics
• inimical
• inimitable
• in/into mothballs
• in/into play
• iniquity
• in it