weight

To contribute or produce one's fair share, as of work, money, etc.

To attach importance to.

To contribute fairly and proportionately to a group effort; to do the work that one is obligated to.

To (attempt to) achieve or perform at a higher level than would be expected based on one's preparation, attributes, rank, or past accomplishments.

To achieve or perform at a level lower than should be expected based on one's preparation, attributes, rank, or past accomplishments.

To exercise influence or authority, especially to an excessive degree or in an objectionable manner.

To support (a cause, a decision, etc.) using one's influence; to endorse.

To place a weight on, attach a weight to, load with a weight; to encumber with a weight.

The distressing combined burden of the problems, doubts, imperfections, and responsibilities associated with human existence.

Very valuable.