Synonyms of the word 
GAUCHE → GRACELESS - INELEGANT - UNPOLISHED
gauche
- adj. Awkward or lacking in social graces; bumbling.
- adj. (mathematics, archaic) Skewed, not plane.
- adj. (chemistry) Describing a torsion angle of 60°.
graceless
- adj. Without grace.
- adj. Lacking gracefulness.
- adj. (archaic) Unfortunate.
inelegant
- adj. Not elegant; not exhibiting neatness, refinement, or precision.
unpolished
- adj. Not polished; not brought to a polish.
- adj. Deprived of polish.
- adj. Not refined in manners; uncivilized; rude; plain.
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