B2 [ I or T ] to cause food, drink, pills, etc. to move from your mouth into your stomach by using the muscles of your throat吞咽，吞下，咽下

[ I ] to use the muscles of your throat, as if moving something from your mouth into your stomach, because you are nervous or frightened, or are about to say something（因为紧张、害怕或要开始说话而）做吞咽动作，咽口水

[ T ] If something large swallows (up) another thing, it makes it disappear or stop existing separately by making it part of itself.吞掉；吞没

[ T ] to use or take away a large part of something valuable大量使用，大量夺走（贵重之物）

C2 [ T ] informal to accept something without question or without expressing disagreement轻信；全盘接受

C2 [ T ] to not express or show something不表露，不表现，抑制住

an act of using the muscles of your throat, or the amount of something you move into your stomach from your mouth by using the muscles of your throat吞，咽，吞咽

a small bird with pointed wings and a tail with two points that flies quickly and catches insects to eat as it flies燕子