1 to fill or stuff

2 (of a form etc) to fill in

1 to fill in a form

2 to write data in a box (on a questionnaire or web form)

1 pad

2 padding

1 to cram

1 to fill a job vacancy

2 to fill in a blank (e.g. on questionnaire or exam paper)

1 to use one's neighbor as a drain

2 to shift one's problems onto others (idiom)

1 sea of hatred is hard to fill (idiom); irreconcilable division

1 bottomless pit of desire (idiom); insatiable greed

2 carnal cravings are never satisfied and are a main obstruction on the path to enlightenment

1 to enjoy oneself in nature's embrace (idiom)

1 lit. mythical bird Jingwei tries to fill the ocean with stones (idiom); futile ambition

2 task of Sisyphus

3 determination in the face of impossible odds