This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. Present participle of ridge.

"Earthing up, sometimes called ridging up, is putting earth round the collar, or crown, of plants (see Booklet No. 1, page 15)."

ridged    ridges    ridging   

throw    cover    extend    continue    turn    plow    plough    spade    beam    form   

wolffian ridge    tentorial ridge    dental ridge    sagittal    barometric ridge    hemal ridge    ridge-roll    ridge rib    temporal ridges    mylohyoid ridge   

Rhodesian Ridgeback   

ridge course    combing ridge   

crest    wrinkle   

abridge    bridge    fridge    midge    miscavige   

slope    peak    hill    valley    ledge    crest    mound    crag    bluff    boulder