adj; indeclinable (with eva particle) in this form
Analysis. ajjhatta (inner) + eva (just, only, indeed) — 'only inwardly' or 'purely internal', emphasizing the interiority or personal nature of something as opposed to the external.
Etymology. ajjhatta is adhicatta contracted: adhi- (on top of, presiding over, above) + citta (mind, heart), literally 'above/on the mind', hence 'in the mind' or 'internal'. The prefix adhi- carries the sense of interiority and personal dominion. Sanskrit adhyātma is cognate, also meaning 'interior, spiritual'; the imagery is of something seated atop or governing the mind.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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