sinksink1 /sɪŋk/ ●●● verb (past tense sank /sæŋk/ or sunk /sʌŋk/ , past participle sunk) 
1
IN WATER [intransitive, transitive] to go down below the surface of water, mud, etc., or to make something do this: 
The Titanic sank to the bottom of the ocean. Submarines were ordered to sink enemy ships.► see thesaurus at dive12FALL/SIT DOWN [intransitive] to fall down heavily, especially because you are weak or tired: I sank down into one of the soft chairs.3MOVE LOWER [intransitive] to move down slowly to a lower level: The sun sank beneath the horizon.4GET WORSE [intransitive] to gradually get into a worse state: In the 1930s, America sank deeper into the Depression.5DECREASE [intransitive] to decrease in amount, number, value, etc.: Share prices are dropping and could sink even further.6be sunk informal to be in a situation in which you are certain to fail or have a lot of problems: If he doesn’t lend us the money, we’re sunk!7your heart sinks/your spirits sink if your heart or spirits sink, you lose your hope or confidence8a sinking feeling a feeling that you get when you realize that something very bad is beginning to happen9sink or swim to succeed or fail without help from anyone else10MONEY [transitive] to spend a lot of money on something SYN invest: They had sunk thousands into that house.11SPORTS [transitive] to get a basketball or golf ball into a basket or holesink in phrasal verb if information, facts, etc. sink in, you begin to understand them or realize their full meaning: At first, what she said didn’t really sink in.
1IN WATER [intransitive, transitive] to go down below the surface of water, mud, etc., or to make something do this: The Titanic sank to the bottom of the ocean. Submarines were ordered to sink enemy ships.► see thesaurus at dive12FALL/SIT DOWN [intransitive] to fall down heavily, especially because you are weak or tired: I sank down into one of the soft chairs.3MOVE LOWER [intransitive] to move down slowly to a lower level: The sun sank beneath the horizon.4GET WORSE [intransitive] to gradually get into a worse state: In the 1930s, America sank deeper into the Depression.5DECREASE [intransitive] to decrease in amount, number, value, etc.: Share prices are dropping and could sink even further.6be sunk informal to be in a situation in which you are certain to fail or have a lot of problems: If he doesn’t lend us the money, we’re sunk!7your heart sinks/your spirits sink if your heart or spirits sink, you lose your hope or confidence8a sinking feeling a feeling that you get when you realize that something very bad is beginning to happen9sink or swim to succeed or fail without help from anyone else10MONEY [transitive] to spend a lot of money on something SYN invest: They had sunk thousands into that house.11SPORTS [transitive] to get a basketball or golf ball into a basket or holesink in phrasal verb if information, facts, etc. sink in, you begin to understand them or realize their full meaning: At first, what she said didn’t really sink in.
