Definition of "Awkwardness" :

noun: trouble in carrying or managing caused by bulk or shape

noun: the inelegance of someone stiff and unrelaxed (as by embarrassment)

noun: the carriage of someone whose movements and posture are ungainly or inelegant

noun: the quality of an embarrassing situation

"He sensed the awkwardness of his proposal."

noun: unskillfulness resulting from a lack of training