1
general::
plough through sth
1. informal to go through a substance or an area of something with difficulty
• We ploughed through the mud., plough through sth
2. to finish reading, eating or dealing with something with difficulty
• I've got an enormous pile of papers to plough through.
• You'll never manage to plough through all that food., plough into sth/sb
If a vehicle ploughs into something or someone, it hits the object or person with great force
• Many people were injured when the train came off the rails and ploughed into the bank., plough sth back
[ M ]
to spend the money that a business has earned on improving that business
• All the profits are being ploughed back into the company., plough on
to continue doing something although it is difficult or boring
• He could see that she didn't like what he was saying, but he ploughed on (= continued talking) regardless.
• It would be a mistake to plough on with this scheme - it'll never work.
Cambridge-Phrasal Verbs
2
general::
noun ADJ. heavy VERB + PLOUGH draw, pull They need two horses to pull these heavy ploughs. | guide PLOUGH + NOUN boy, team | furrow
Oxford Collocations Dictionary