Match each word from column a with the correct definition from column b.
column a column b
1. hiss a. to talk quickly or mechanically
2. splash b. to fall in drops; to move little by little
3. grumble c. to speed, with a buzz
4. patter d. to make a sharp “sss” sound; to show disapproval
5. zoom e. to make liquid fall or hit something in a noisy way
6. trickle f. to mutter discontent