1. amphi - Greek prefix = of both kinds; from both (or all) sides
Definitions from

2. amphibian
noun
any cold-blooded vertebrate of the class Amphibia that typically live on land but breed in water. The young breathe by gills, but the adults breathe by lungs.
Examples: frogs, toads, newts, salamanders, caecilians
From amphi (of both kinds) + bios (life)

3. amphibian- noun
any cold-blooded vertebrate of the class Amphibia that typically live on land but breed in water. The young breathe by gills, but the adults breathe by lungs.
Examples: frogs, toads, newts, salamanders, caecilians

4. amphibious
adjective
capable of operating on both land and water: amphibious vehicles.
Examples: amphibious vehicles, amphibious planes, amphibious troops

5. amphibious- adj
capable of operating on both land and water: amphibious vehicles.
Examples: amphibious vehicles, amphibious planes, amphibious troops

6. From amphi (both or all sides) + theatros (to watch or look)
Mystery Word- an oval or round building with tiers of seats around a central open area
noun
amphitheater
From amphi (both or all sides) + theatros (to watch or look)
Examples: arena, stadium, auditorium

7. amphitheater- noun
an oval or round building with tiers of seats around a central open area
From amphi (both or all sides) + theatros (to watch or look)
Examples: arena, stadium, auditorium

8. mal - Latin prefix = bad or evil Definitions from www.dictionary.com
Image from devilspice.com

9. malodorous Having an unpleasant or offensive odor; bad smelling
adjective
From mal (bad) + odorus (to carry a smell)
Having an unpleasant or offensive odor; bad smelling

10. malodorous- adj
Having an unpleasant or offensive odor; bad smelling

11. evil; harmful; injurious:
malevolent
adjective
evil; harmful; injurious:
Examples: a malevolent deed; a malevolent action;
a malevolent person

12. evil; harmful; injurious
malevolent
evil; harmful; injurious
Examples: a malevolent deed; a malevolent action; a malevolent person

13. Mystery Word-motivated by wrongful, vicious, or mischievous purposes
Adj.

14. malicious- adj motivated by wrongful, vicious, or mischievous purposes
Examples: malicious intent; a malicious act; malicious gossip; malicious lies etc.

15. malfeasance
noun

16. malfeasance- noun -the performance of an act that is unlawful or harmful; wrongdoing, often by a public official ex: The prime minister must appear before the anti-corruption commission on February 27 to answer the malfeasance charges