The adj hard has 12 senses (first 5 from tagged texts)
1. (37) difficult, hard -- (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"; "a difficult child"; "found himself in a difficult situation"; "why is it so hard for you to keep a secret?")
2. (20) hard -- (dispassionate; "took a hard look"; "a hard bargainer";)
3. (15) hard -- (resisting weight or pressure)
4. (5) hard, knockout, severe -- (very strong or vigorous; "strong winds"; "a hard left to the chin"; "a knockout punch"; "a severe blow")
5. (4) arduous, backbreaking, grueling, gruelling, hard, heavy, laborious, operose, punishing, toilsome -- (characterized by toilsome 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")
6. unvoiced, voiceless, surd, hard -- (produced without vibration of the vocal cords; "unvoiced consonants such as `p' and `k' and `s'")
7. hard, concentrated -- ((of light) transmitted directly from a pointed light source)
8. hard -- ((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")
9. intemperate, hard, heavy -- (given to excessive indulgence of bodily appetites especially for intoxicating liquors; "a hard drinker")
10. hard, strong -- (being distilled rather than fermented; having a high alcoholic content; "hard liquor")
11. hard, tough -- (unfortunate or hard to bear; "had hard luck"; "a tough break")
12. hard -- (dried out; "hard dry rolls left over from the day before")
Overview of adv hard
The adv hard has 10 senses (first 5 from tagged texts)
1. (12) hard -- (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")
2. (3) hard, firmly -- (with firmness; "held hard to the railing")
3. (1) hard -- (earnestly or intently; "thought hard about it"; "stared hard at the accused")
4. (1) hard, severely -- (causing great damage or hardship; "industries hit hard by the depression"; "she was severely affected by the bank's failure")
5. (1) hard -- (slowly and with difficulty; "prejudices die hard")
6. heavily, intemperately, hard -- (indulging excessively; "he drank heavily")
7. hard -- (into a solid condition; "concrete that sets hard within a few hours")
8. hard -- (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")
9. hard -- (with pain or distress or bitterness; "he took the rejection very hard")
10. hard -- (to the full extent possible; all the way; "hard alee"; "the ship went hard astern"; "swung the wheel hard left")