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“ambilevosity”
The inability to perform acts requiring manual skills with either or both hands: Sometimes Mike had a handicap as a mechanic because of his awkward ambilevosities.
Jane broke both of her arms when she fell down the stairs and had them in casts; the ambilevosity that followed prevented her from doing anything until her arms were healed again.
Little Tommy was just one year old and the ambilevosity of holding a cup properly to drink from still needed more development!