Clearly, obviously (because it is visually obvious).(adverb)
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Use "needless to say" in a sentence
"There were five or six other new Universal Languages which emerged around this time with the intention of replacing the Babylonian confusion of human languages with a single, common mother-tongue for the whole world of newts and men; needless to say that there were countless disputes about which of these international languages is the most useful, most euphonious and the most universal."
"My behaviour to the Bankers is a publick instance; and the proceedings between Mrs. Hyde and Mrs. Sutton for private ones, are such convincing evidences, that it will be needless to say any more to 't."
"Rickelton noted: The word sounds pretty official and needless to say joy reigned in the bunkroom."