/tʃʌg; tʃʌˇ/
v (-gg-)
1 [I] make the short dull repeated sound of an engine running slowly （发动机缓慢运转时）发出（持续而单调的）短声; 发出突突声.
2 (phr v) chug along, down, up, etc move steadily in the specified direction while making this sound （发出突突声朝某方向）稳稳行进
*The boat chugged along the canal. 小船稳稳地顺着运河突突地航行.

n sound made by a chugging engine （发动机缓慢运转时发出的）突突声.

v past tense and past participlechuggedpresent participlechugging
[Date: 1800-1900; Origin: From the sound]
[I always + adverb/preposition]
if a car, train etc chugs somewhere, it moves there slowly, with the engine making a repeated low sound
chug along/up/around etc
　The boat chugged out of the harbour.
[T]alsochug-a-lug
AmE informal to drink all of something in a glass or bottle without stopping
[I always + adverb/preposition]
to make slow but steady progress
　The economy just keeps chugging along.
>chugn [C usually singular]