Im‐meas″ur‐a‐ble (?), a. [Pref. im- not + measurable: cf. F. measurable. Cf. Immensurable, Unmeasurable.] Incapable of being measured; indefinitely extensive; illimitable; immensurable; vast.
Of depth immeasurable. Milton.
Webster's Dictionary 1913
Im‐meas″ur‐a‐ble (?), a. [Pref. im- not + measurable: cf. F. measurable. Cf. Immensurable, Unmeasurable.] Incapable of being measured; indefinitely extensive; illimitable; immensurable; vast.
Of depth immeasurable. Milton.