perihelion /per-i-hēˈli-ən/

1. The point of the orbit of a planet or a comet at which it is nearest to the sun, opp to aphelion
2. Culmination (figurative)

• irritation
• irritations
• irritative
• irritator
• irritators
• irrupt
• irrupted
• irrupting
• irruption
• irruptions
• irruptive
• irruptively
• irrupts
• IRS
• irukandji
• irukandjis
• Irvingism
• Irvingite
• is
• is-
• IS
• Is.
• ISA
• Isa.
• isabel