What's the "een" in Halloween?
late 14c. "to consider, contemplate" (implied in surveyance), from Old French surveeir, from Medieval Latin supervidere "oversee" (see supervise). Meaning "examine the condition of" is from mid-15c. That of "to take linear measurements of a tract of ground" is recorded from 1540s. Related: Surveyed; surveying.
late 15c., survei, "oversight, supervision," from survey (v.). The meaning "act of viewing in detail" is from 1540s. Meaning "systematic collection of data on opinions, etc." is attested from 1927.