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[weigh on] or [weigh upon]  {v.}

1. To be a weight or pressure on; be heavy on.

The pack weighed heavily on the soldier's back.

2. To make sad or worried; trouble; disturb; upset.

Sadness weighed on Mary's heart when her kitten died.

*  […]

[weigh on one's mind]

See: [WEIGH ON] (2).

[weigh one's words]  {v. phr.}

To choose your words carefully; be careful to use the right words.

When a teacher explains about religion, he must weigh his words because his pupils may be of several different faiths.

* /When old Mr. Jones talked to  […]

[weigh upon]

See: [WEIGH ON].

[weight]

See:

[PULL ONE'S WEIGHT],

[SWING ONE'S WEIGHT],

[THROW ONE'S WEIGHT AROUND].

[weight down]

See: [WEIGH DOWN].

[weight of the world on one's shoulders] or [world on one's shoulders] or [world on one's back]  {n. phr.}

A very heavy load of worry or responsibility; very tired or worried behavior, as if carrying the world; behavior as if you are very important.

*  […]

[welcome]

See: [WEAR OUT ONE'S WELCOME].

[welcome mat]  {n.}

1. A mat for wiping your shoes on, often with the word "welcome" on it, that is placed in front of a door.

Mother bought a welcome mat for our new house.

2.  {informal}

A warm welcome; a friendly greeting. — Used in such phrases  […]

[welcome with open arms]

See: [WITH OPEN ARMS].