hard in WordNet English dictionary

1. characterized by effort to the point of exhaustion; especially physical effort
   "worked their arduous way up the mining valley"; "a grueling campaign"; "hard labor"; "heavy work"; "heavy going"; "spent many laborious hours on the project"; "set a punishing pace"
   arduous  backbreaking  grueling  gruelling  hard  heavy  laborious  operose  punishing  toilsome 
   
2. (of light) transmitted directly from a pointed light source
   hard  concentrated 
   
3. not easy; requiring great physical or mental effort to accomplish or comprehend or endure
   "a difficult task"; "nesting places on the cliffs are difficult of access"; "difficult times"; "why is it so hard for you to keep a secret?"
   difficult  hard 
   
4. produced without vibration of the vocal cords
   "unvoiced consonants such as `p' and `k' and `s'"
   unvoiced  voiceless  surd  hard 
   
5. resisting weight or pressure
   hard 
   
6. dispassionate
   "took a hard look"; "a hard bargainer";
   hard 
   
7. (of speech sounds); produced with the back of the tongue raised toward or touching the velum
   "Russian distinguished between hard consonants and palatalized or soft consonants"
   hard 
   
8. being distilled rather than fermented; having a high alcoholic content
   "hard liquor"
   hard  strong 
   
9. unfortunate or hard to bear
   "had hard luck"; "a tough break"
   hard  tough 
   
10. given to excessive indulgence of bodily appetites especially for intoxicating liquors
    "a hard drinker"
    intemperate  hard  heavy 
    
11. dried out
    "hard dry rolls left over from the day before"
    hard 
    
12. very strong or vigorous
    "strong winds"; "a hard left to the chin"; "a knockout punch"; "a severe blow"
    hard  knockout  severe 
    

1. with firmness
   "held hard to the railing"
   hard  firmly  hard  firmly 
   
2. with effort or force or vigor
   "the team played hard"; "worked hard all day"; "pressed hard on the lever"; "hit the ball hard"; "slammed the door hard"
   hard  hard 
   
3. to the full extent possible; all the way
   "hard alee"; "the ship went hard astern"; "swung the wheel hard left"
   hard  hard 
   
4. slowly and with difficulty
   "prejudices die hard"
   hard  hard 
   
5. causing great damage or hardship
   "industries hit hard by the depression"; "she was severely affected by the bank's failure"
   hard  severely  hard  severely 
   
6. indulging excessively
   "he drank heavily"
   heavily  intemperately  hard  heavily  intemperately  hard 
   
7. earnestly or intently
   "thought hard about it"; "stared hard at the accused"
   hard  hard 
   
8. with pain or distress or bitterness
   "he took the rejection very hard"
   hard  hard 
   
9. very near or close in space or time
   "it stands hard by the railroad tracks"; "they were hard on his heels"; "a strike followed hard upon the plant's opening"
   hard  hard 
   
10. into a solid condition
    "concrete that sets hard within a few hours"
    hard  hard