Meaning of "forsake"

[Larina]

Synonyms Lesson, Advanced Level

ESL/EFL Test #104 "Synonyms for abandon", question 3

Sometimes good friends will ......... you just when you need them.

(a) quit
(b) surrender
(c) resign
(d) forsake

Synonyms Lesson, Advanced Level

ESL/EFL Test #104 "Synonyms for abandon", answer 3

Sometimes good friends will forsake you just when you need them.

Correct answer: (d) forsake

Your answer was: incorrect
Sometimes good friends will quit you just when you need them.
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What is the real meaning of "forsake"?
I understand that it's very negative.

Larina

[Conchita]

To forsake is to leave behind, to abandon. If you forsake someone, you desert them, especially at a time when they need you. You can also say that you leave them in the lurch.