Undulate
Surge, wave
Vexation
Anger, annoyance
Lumbering
Awkward, clumsy
Nonchalant
Collected, calm
Conjecture
Speculation, fancy, guess
Retaliation
Response, revenge
Diffidence
Meekness, shyness
Pondering
Review, consider
Detestable
Despised, hateful
Inundated
Overwhelmed, overpowered
Clambered
Mounted, ascended
Elusive
Slippery, difficult to catch or grasp
Flamboyant
Lively, confident
Trudging
Tramping, ploughing
Furtive
Secretive, hidden