Ambiguous (adjective)

1. Open to more than one interpretation or having a double meaning.
2. Unclear or doubtful in meaning.
3. Lacking clearness or definiteness.
4. Having no clear shape or form.

Origin:

From latin ambiguus, from ambigere (“to go about, wander, hesitate”), from ambi- (“both”) + agere (“to drive, lead, act”).

Examples:

1. The meaning of his message was ambiguous and difficult to interpret.
2. The instructions were ambiguous and did not provide a clear understanding of what was expected.
3. Her response to the question was ambiguous and unclear.
4. The shape of the object was ambiguous and hard to make out.
5. The contract language was ambiguous and left room for interpretation.