We usually use ill when we are sick.
The nouns of the two have different meanings. Ill nouns denote misfortune, while sick nouns denote patience.
Specifically, their meanings are as follows
bad
Disadvantageously; unfavorably
Unfortunately; misfortune
fall ill
[adjective comparative degree is worse adjective superlative and worst adverb comparative degree is worse adverb superlative and worst]
fall ill
Adjective (abbreviation for adjective)
1. Sick; Unhealthy; Uncomfortable; Vomiting II. Not good; Not good; Evil; Harmful 3. Annoying 4. Sad; Unhappy 5. Unlucky; Unlucky; Unfortunately, 6. Not suitable; Not suitable; Imperfect 7. Unfriendly; Malicious; Severe and cruel 8. Clumsy and clumsy; Unfamiliar 9. [Slang] To detain or arrest 10. [Archaic] Difficult
adverb
1. Not good; In a bad way; Harmfully. Unfriendly; Disadvantageously; Malicious; Cruelty 3. Unfortunately; Incomplete; Inappropriately; 4. clumsily, almost nothing; difficulty
Noun (short for noun)
1. disease; Disease 2. Not good; Evil; Evil deeds 3. Unfortunately; Injury; Disaster; Disaster; Pain 4. Bad words and deeds 5. Sin [archaic]
phrase
1. Poverty and misfortune. 2. Good or bad, goodbye. Being sick is harmful to ... 4. Uncomfortable, uncomfortable, uncomfortable. People who do bad things are terrible. [Proverbs] People who do bad things are scared to death; Guilty. 6. Ill-gotten money; Ill-gotten gains. Make sb sick; Make sb angry; Make sb. Sick 8. Be angry at sth.
ill
patient
vomit
[adjective comparative sicker adjective superlative sickerst]
sick 1 [sik]
Adjective (abbreviation for adjective)
1. Sick, sick, uncomfortable, uncomfortable; Unhealthy II. Nausea and vomiting; Cause vomiting. Nausea 4. Pale, look bad; Sick 5. Sick; Relating to or serving patients. (mentally, morally, etc. ) is not perfect or normal; Corruption 7. Creepy; Extremely cruel. Nausea, resentment 9. Frustrated; Uneasy; Extremely unhappy 10. (mind, feelings, etc. ) chaos 1 1. Fault 12. Desire; Nostalgia 13. Menstruation (female) 14. Lifeless, lifeless; 15. 16. 16. (wine) Not fresh. Fragile (cast iron, etc. ) 17. [American] (Turkish) 18. [Slang] (Drug addict) is addicted to drugs.
Noun (short for noun)
1. [Patient] (collectively) is sick. Vomiting 3. Military [air interception] is inefficient, and there is a problem (equipment efficiency is weakened) vt. vomit
phrase
1. As sick as a cat
A. Seriously ill
B. [Spoken English] I feel sick. Sick as a dog. 3.Beoffsick is absent. 4. disgust, boredom ... 5. sick. 6. Feel nauseous. 7. Get sick and seek medical treatment; Call in sick. Look sick [say it] without leaving any impression; Dwarf by 9. Pretend to be sick 10. On sick leave [,get sick leave allowance of 1 1. Sick leave = sick leave 13. Nausea [oral] nausea 13.
Deformation:
ill
sick2
transitive verb
1. Make (a dog) attack (or harass), especially (right, right) attack.
Kill the dog and attack 2. Chase; Violent attacks: for example, disgust them!
Bite them! 3. Impulse ... do (or chase, accompany, etc.). Example: Make someone feel sick doing something.
Let sb. Do sth [also sic]