Interloper
An intruder
Intrinsic
Belonging to someone or something, inherited
Inveigh
Express strong disapproval
Lassitude
Lack of energy
Millennium
1000 years
Occult
To hide or conceal
Mysterious or supernatural
Permeated
To spread through
Precipitate
Moisture or characterized by excessive haste
Stringent
Strict
Surmise
To think or believe without supporting evidence