Select the most appropriate option to fill in the blank.

He was a ______ stranger to me.

complete

The most appropriate option to fill in the blank is:

☀ complete

Explanation: In this context, the word "complete" emphasizes the extent to which the person is unknown to the speaker. It conveys the idea that there is no familiarity or previous acquaintance with the individual. The other options do not carry the same connotation of unfamiliarity and lack of prior connection. Here's an explanation for each option:

• Settled: This word typically refers to a state of stability or comfort, and it doesn't fit the context of describing a stranger.

• Full: While "full" could be used to describe someone who is fully a stranger, it doesn't convey the sense of complete unfamiliarity as strongly as the word "complete."

• Entire: While "entire" can mean the whole or complete, it doesn't convey the notion of being entirely unknown or unfamiliar as effectively as "complete" does.