Godan verb with 'ku' endingintransitive verb word usually written using kana alone to paw (at) the ground

Godan verb with 'ku' endingintransitive verb word usually written using kana alone to struggle (using one's arms and legs);to flounder;to flail about

Godan verb with 'ku' endingintransitive verb word usually written using kana alone to struggle (to escape an adverse situation);to strive;to make every effort