No definitions found for 'immemorial usage'
Perhaps one of these:
inamorata,
inamorate,
innumerate,
innumerous,
innumerability,
immemorial possession,
inenarrable,
inamorately,
ionian order,
immemorable,
immemorially,
immune response,
innumerable,
innumerableness,
immune reaction,
immemorial,
inamorato,
innumerably,
inamoratos,
in one ear,
in amours with