sponge/ sp^nʤ /

1.noun [u] 
(substance man-made,natural) 海绵

2.noun [c] 
(for washing) 海绵擦

3.noun [c/u] 
(also: sponge cake) 松糕

4.vt.
(wipe) 用海绵擦

5.vi.[inf] 
to sponge off {or} on sb 白吃白喝某人

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