adj.繁重的，艰巨的，费力的，令人焦虑的

The workload on the new project was so onerous that some team members began to feel overwhelmed.
这个新项目的任务负担如此繁重，以至于一些团队成员感到压力山大。
The tax regulations imposed by the government proved to be an onerous burden on small businesses.
政府强加的税收规定对小企业来说是一种沉重的负担。
His responsibilities as a single parent were onerous, but he never complained.
作为单亲家长，他的责任繁重，但他从不抱怨。
The onerous terms of the loan left the borrower with little hope of repaying it in full.
贷款苛刻的条款让借款人几乎无法全额偿还。
The onerous commute was taking a toll on her mental health.
长途通勤对她的心理健康造成了严重影响。
The onerous task of cleaning the entire house fell upon her shoulders.
清洁整栋房子的任务落在了她身上。
The company's strict adherence to deadlines made the job onerous for the employees.
公司严格遵守截止日期的规定，使得员工的工作变得异常艰难。
The onerous duties of a teacher often go unnoticed, but their impact is immeasurable.
教师的艰辛职责常常被忽视，但其影响却是无法估量的。
The onerous legal process forced the family to endure months of uncertainty.
这冗长繁琐的法律程序使这家人经历了数月的不确定。
The athlete decided to retire early due to the onerous demands of training and competition.
由于训练和比赛的严苛要求，这位运动员决定提前退役。