Hard (adj)
1. Sth that is not easy to bend, break or cut.
- I didn't get much sleep last night as the hotel bed was as hard as a rock.
- John took the chicken out from the refrigerator over two hours ago but it's still really hard.
2. Difficult.
- I can only imagine how hard it must be being a single mother of two children.
- Daniel's daughter always complains about Science being a hard subject.
3. Require effort.
- Getting to the top of the hill was hard work but definitely worth it.
- Try giving the door a good hard push and see if it opens.
Hardly (adverb) - barely, almost not.
- The students sitting at the back of the class could hardly hear what the teacher was saying.
- Hannah hardly ate anything today as she was down with a terrible flu.
- The children hardly ever (= almost never) have time to do anything but study when they are preparing for their exams.