the quality of being difficult to do; "he assigned a series of problems of increasing hardness"; "the ruggedness of his exams caused half the class to fail"
the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale
a constitutional tendency to be gloomy and depressed
characterized by or causing or expressing sadness; "growing more melancholy every hour"; "her melancholic smile"; "we acquainted him with the melancholy truth"
filled with regret or concern; used often to soften an unpleasant statement; "I'm afraid I won't be able to come"; "he was afraid he would have to let her go"; "I'm afraid you're wrong"
feeling worry or concern or insecurity; "She was afraid that I might be embarrassed"; "terribly afraid of offending someone"; "I am afraid we have witnessed only the first phase of the conflict"
having feelings of aversion or unwillingness; "afraid of hard work"; "afraid to show emotion"