'analysand' originates from Latin, specifically the gerundive ending '-andus' added to 'analyse', where '-andus' meant 'to be (analyzed)'.

'analysand' was formed in the early 20th century in English, modeled after Latin grammatical forms, and became the standard term in psychoanalysis for a person being analyzed.

Initially, it meant 'one who is to be analyzed', and it has retained this specific meaning in the context of psychoanalysis.