臥薪嘗胆[gashinshoutan] going through thick and thin to attain one's objective
薪水[shinsui] fuel and water
薪炭[shintan] wood and charcoal
薪拾い[takigihiroi] firewood gathering

薪割[makiwari] hatchet
薪能[takiginou] noh theater performed at night by a fire
薪小屋[makigoya] woodshed