Front

Visible or understood; obvious

Back

apparent

Front

Make a statement or situation less confused and more comprehensible.

Back

clarify

Front

Causing great and irreparable harm or damage

Back

Destructive

Front

A risky or daring journey or undertaking

Back

venture

Front

requiring great strength or effort

Back

herculean

Front

A book of maps or charts

Back

atlas

Front

Luminous colors changing with angle

Back

iridescent

Front

Plants of a region, habitat, or geological period

Back

flora

Front

Animals of a region, habitat, or geological period

Back

fauna

Front

A place or medium for exchanging ideas on an issue.

Back

forum