huge cardinal
cardinal number κ such that there exists an elementary embedding j: V → M from V into a transitive inner model M with critical point κ, such that every sequence of length j(κ) whose elements are in M belongs to M
en-GB/ˈhjuːd͡ʒ ˈkɑːdɪnl/
en-US/ˈhjud͡ʒ ˈkɑɹdənəl/