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weigh on (someone or something)
1. Of an additional weight, to burden, immobilize, or bend something or something. The fallen tree must have weighed on the other to the point that both fell. I'm just worried about all the snow weighing on the roof. My backpack weighed on me heavily as I trudged through the hallways.
2. By extension, to be a burden or impediment to someone or something. A noun or pronoun can be used between "weigh" and "on." It feels good to finally get that off my chest. The guilt has weighed on me for years. All the extra orders have been weighing on the production line a bit, but hopefully we'll be able to get back to normal operations after the holidays.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
weigh (up)on someone
Fig. to burden or worry someone. (Upon is formal and less commonly used than on.) The problems at the office were beginning to weigh upon Mr. Franklin. My problems began to weigh on me.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
Also, weigh upon. Depress, as in His criticism weighed on her, or The long silence began to weigh upon us. This idiom was first recorded in 1775.
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
weigh onor weigh upon
1. To cause to sink or bend heavily by or as if by added weight: The bad news weighed on the prices of oil stocks. A coating of ice weighed upon the slender branches.
2. To preoccupy someone with a feeling of guilt or blame: The consequences of their mistake weighed on them. Heavy guilt weighed upon the thief.
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.