gum

• 英语名词，有多个含义：可以指覆盖牙根的致密肉质组织（牙龈），也可以指用于咀嚼或作为粘合剂的黏性物质（口香糖、胶）。

A noun with multiple meanings: it can refer to the firm flesh covering the roots of the teeth, or to a sticky substance used for chewing or as an adhesive.

1. Chewing gumA1informal

   A soft, chewy substance for chewing, usually flavored and sweetened.

   口香糖

   • He offered me a piece of gum.
   • She was chewing gum during the lecture.
   • The floor was sticky with old gum.

   同义词bubble gumchewing gum

2. Gums (anatomy)A2formalmedical

   The firm, pink flesh around the base of the teeth.

   牙龈

   • Brushing your teeth helps keep your gums healthy.
   • The dentist said my gums are inflamed.
   • Bleeding gums can be a sign of gum disease.

   同义词gingiva

3. Tree resinB2formal

   A sticky substance exuded by some trees, used in adhesives and varnishes.

   树胶

   • The tree produces a natural gum used in glue.
   • Gum arabic is derived from acacia trees.
   • The varnish is made from a mixture of gum and oil.

   同义词pitchresin

• 动词，指咀嚼或用胶粘合，也指在物体上涂抹黏性物质。

A verb meaning to chew or stick with gum, or to apply adhesive gum to something.

1. B1informal

   To chew or masticate something, especially with the gums.

   用牙龈咀嚼

   • The baby gummed the teething ring.
   • He gummed his food slowly because of his sore teeth.
   • She gummed the candy until it softened.

   同义词chewmasticatemouthmumble

2. Stick or clogB2informal

   To cause something to become sticky or clogged, often with a sticky substance.

   粘住

   • The syrup gummed up the machine's gears.
   • The glue gummed the pages of the book together.
   • The drain was gummed up with hair and soap.

   同义词blockchokecloggluejamobstructpasteplugstickstop

短语动词变体gum up