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[cast down]  {adj.}

Discouraged; sad; unhappy. — Used less often than the reverse form, "downcast".

Mary was cast down at the news of her uncle's death.

[cast in one's lot with]  {formal}

See: [THROW IN ONE'S LOT WITH].

[cast off]  {v.}

1a. or [cast loose]

To unfasten; untie; let loose (as a rope holding a boat).

The captain of the boat cast off the line and we were soon out in open water.

1b. To untie a rope holding a boat or something suggesting a boat.

* /We  […]

[cast one's lot with]

See: [THROW IN ONE'S LOT WITH].

[cast out]  {v.},  {formal}

To force (someone) to go out or away; banish; expel.

After the scandal, he was cast out of the best society.

Compare: [CAST OFF] (3).

[cast pearls before swine] or [cast one's pearls before swine]  {n. phr.},  {literary}

To waste good acts or valuable things on someone who won't understand or be thankful for them, just as pigs won't appreciate pearls. — Often used in negative sentences.  […]

[cast the first stone]  {v. phr.},  {literary}

To be the first to blame someone, lead accusers against a wrongdoer.

Jesus said that a person who was without sin could cast the first stone.

* /Although Ben saw the girl cheating, he did not want to  […]

[cast up]  {v.},  {literary}

1. To turn or direct upward; raise.

The dying missionary cast up his eyes to heaven and prayed.

2.  {archaic}

To do sums; do a problem in addition; add.

Cast up 15, 43, 27, and 18.

* /When John had all the figures,  […]

[castle in the air]

See: [BUILD CASTLES IN THE AIR].

[castles in Spain]

See: [CASTLES IN THE AIR].