To ingratiate; to obtain access to or introduce something by subtle, cunning or artful means.
To hint; to suggest tacitly (usually something bad) while avoiding a direct statement.
To creep, wind, or flow into; to enter gently, slowly, or imperceptibly, as into crevices.
To make (someone or something) no longer noble
Not noble; ignoble; base.
Of a metal, being at the lower end of the electrochemical series, i.e. oxidising readily.