insulation

insulate

tight / reliable

stable, fulfilled

be fast, securely in place / be reliable, level-headed / keep going, keep trying

fast (in a firm or secure manner), tightly / surely, unwaveringly, steadily, reliably

wood / raw material / talent, genius

material; substance / timber / lumber / ingredient / resources / stock

a house / one's own home / a home, household / a family

winter