Vocabulary in Video

apprehended - caught; arrested; seized

cache - buried hiding place for supplies and equipment -- to lighten the load and to have a supply depot available for the return journey

canoe - large round-bottomed dugout, hollowed out from a large tree or built to a frame and covered with bark or skins (much larger than modern day canoes)  

cartographer - a person who makes maps

celestial - pertaining to the sky  

chronometer - an instrument for measuring time accurately

clasp - grip or grasp of the hand; grip firmly; a fastening such as a hook to hold objects or parts together

constitution (of the body) -  state of health

equipage - equipment or furnishings

fauna - animals

flora - plants

keelboat - a shallow covered barge-like riverboat that could be sailed, rowed, poled or towed.  The keelboat used by Lewis and Clark could carry 12 tons in the hold, had a 32-foot-high mast, was 55 feet long, and had 11 benches for oarsmen.

lament - to grieve; to mourn

meander - to follow a winding and turning course; to wander aimlessly and idly without fixed direction

perish - die; disappear; to pass from existence

persevere - to persist; remain constant in the face of obstacles or discouragement

physiognomy - the art of discovering temperament and character from outward appearance

pirogue - big flat-bottomed masted row boats built from planks and designed for shallow waters (somewhat different from a modern day pirogue -- a canoe made from a hollowed tree trunk)

portage - carrying supplies and canoes overland between waterways

purge (the body) - to rid the body of impurities

reconnaissance - an inspection or survey of a region to examine the terrain

retroceded - went back; returned

undaunted - fearless; courageous in the face of difficulty or danger