| A | B |
| approach | coming closer; to go closer to |
| burrow | a hole or tunnel dug by an animal as a home |
| cease | to stop; to come or bring to an end |
| destructive | causing harm or damage |
| drowsy | tired or sleepy |
| famished | very hungry |
| forecast | to figure out and say what will happen before it takes place; a telling of what will happen |
| hibernate | to spend the winter in a resting state |
| migrate | to move from one country or region to another |
| migration | the act of migrating |
| migratory | moing from one place or country to another, usually regularly |
| nestle | to settle down comfortably, as if in a nest; to lie in a shelter, partly hidden in place |
| observe | to see or to notice |
| prepare | to make or get ready |
| preparation | something done to get ready |
| reduce | to make or become smaller or less |
| reduction | the act of reducing or the amount by which something is reduced |
| severe | very strict or harsh |
| severe | hard to bear or deal with |
| venture | to dare to do, to go, or to say |
| venture | something that involves the risk of a loss |
| observe | to comment or remark |
| observe | to mark an event or day |
| observe | to obey |
| burrow | to dig deep into |
| burrow | to dig a hole or tunnel under something |