ESEN
Which one to use?Beginneradjetivo / adverbioadjetivo
HardvsDifficult
Both mean "not easy", but "hard" also means physically firm or working intensely.
Side-by-side comparison
Hard
adjetivo / adverbioRequiring effort or not easy. Also: physically firm, or with great intensity (as adverb).
The exam was really hard. I almost failed.
She works hard every day to support her family.
This bed is too hard. I cannot sleep on it.
Difficult
adjetivoRequiring skill, effort, or being complex to understand or accomplish.
This grammar rule is very difficult to explain.
It was a difficult decision to make under pressure.
Learning a new language as an adult can be difficult.
Common mistake
"She works hardly" is wrong and means the opposite of what you intend: "hardly" = barely/almost not. The adverb of intensity is "hard" without -ly: "She works hard" = works with intensity. "She hardly works" = barely works at all. They are opposites.
Trick to remember it
The unique danger of "hard": as an adverb, it does NOT add -ly. "Work hard, study hard, try hard" are correct. "Hardly" exists but means "barely". This rule is the opposite of almost every adverb in English.
Quick rule
"Hard" and "difficult" = not easy (interchangeable). "Hard" as adverb = intensely (NOT "hardly"). "Hardly" = barely.
Did you know?
"Difficult" comes from Latin "difficilis" (not easy), while "hard" comes from Proto-Germanic "harduz" (strong, solid, resistant). This difference in origin explains why "hard" has the physical meaning of firmness (hard rock, hard surface) in addition to the abstract sense of difficulty, while "difficult" only has the abstract. English has many such pairs: a more formal Latin-origin word (difficult, purchase, commence) versus a more everyday Germanic-origin word (hard, buy, start). Knowing a word's origin often helps you judge when to sound more formal or more natural.
Practise what you learned
Exercise 1 · Pick the right one
The maths exam was really _____ . Half the class failed.
Exercise 2 · Pick the right one
Push _____! You are almost at the top of the hill.
Exercise 3 · Form the word
Related word pairs
ActuallyvsReally
"Actually" corrects or contrasts an assumption; "really" intensifies or confirms.
HardvsHardly
"Hard" as an adverb means with effort or intensity; "hardly" means almost not, barely.
LatevsLately
"Late" means behind schedule or at an advanced hour; "lately" means recently or in recent times.
AbovevsOver
"Above" is at a higher level without contact; "over" implies covering, movement, or crossing.
Bryan López
Founder of SpeakUP Academy