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n.
the power of attracting or holding one's attention (because it is unusual or exciting etc.); "they said nothing of great interest"; "primary colors can add interest to a room"
n.
the quality (positive or negative) that renders something desirable or valuable; "the Shakespearean Shylock is of dubious value in the modern world"
n.
the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose; "he gave me an assist with the housework"; "could not walk without assistance"; "rescue party went to their aid"; "offered his help in unloading"