Read the dictionary definition of hard. All definitions for this word.
1. not easy; requiring great physical or mental effort to accomplish or comprehend or endure
1. a difficult task
2. nesting places on the cliffs are difficult of access
3. difficult times
4. why is it so hard for you to keep a secret?
2. characterized by effort to the point of exhaustion; especially physical effort
1. worked their arduous way up the mining valley
2. a grueling campaign
3. hard labor
4. heavy work
5. heavy going
6. spent many laborious hours on the project
7. set a punishing pace
3. dried out
1. hard dry rolls left over from the day before
4. unfortunate or hard to bear
1. had hard luck
2. a tough break
5. resisting weight or pressure
6. dispassionate
1. took a hard look
2. a hard bargainer
7. (of speech sounds); produced with the back of the tongue raised toward or touching the velum
1. Russian distinguished between hard consonants and palatalized or soft consonants
8. (of light) transmitted directly from a pointed light source
9. being distilled rather than fermented; having a high alcoholic content
1. hard liquor
10. given to excessive indulgence of bodily appetites especially for intoxicating liquors
1. a hard drinker
11. produced without vibration of the vocal cords
1. unvoiced consonants such as `p' and `k' and `s'
12. very strong or vigorous
1. strong winds
2. a hard left to the chin
3. a knockout punch
4. a severe blow
13. with effort or force or vigor
1. the team played hard
2. worked hard all day
3. pressed hard on the lever
4. hit the ball hard
5. slammed the door hard
14. to the full extent possible; all the way
1. hard alee
2. the ship went hard astern
3. swung the wheel hard left
15. slowly and with difficulty
1. prejudices die hard
2. he was so dizzy he could hardly stand up straight
16. causing great damage or hardship
1. industries hit hard by the depression
2. she was severely affected by the bank's failure
17. with firmness
1. held hard to the railing
18. earnestly or intently
1. thought hard about it
2. stared hard at the accused
19. with pain or distress or bitterness
1. he took the rejection very hard
20. very near or close in space or time
1. it stands hard by the railroad tracks
2. they were hard on his heels
3. a strike followed hard upon the plant's opening
21. into a solid condition
1. concrete that sets hard within a few hours
22. indulging excessively
1. he drank heavily