on [phrasal verb] [T] - (of problems, responsibilities etc.) to cause feelings of anxiety or guilt in (someone or their mind)He's under huge pressure at work and it's really weighing on him.She knew she had treated him badly and it weighed heavily on her mind for a long time. [T]
WEIGH
Meaning of WEIGH in English
Cambridge English vocab. Кембриджский английский словарь. 2012