Perpetual and Undefined

Perpetual adjective - Going on and on without any interruptions.

Undefined and perpetual are semantically related In some cases you can replace term "Undefined" with "Perpetual", this adjectives are similar.

Nearby Words: perpetuation, perpetuate, perpetually, perpetuity

Undefined adjective - Not seen or understood clearly.

Perpetual and undefined are semantically related in infinite topic. Sometimes you can use "Perpetual" instead an adjective "Undefined".