word roots

demo- = people; 

detrit- = wear off; 

ecto- = outer 

endo- = inner 

estuar- = the sea 

etho- = custom, habit 

eu- = good, well; 

geo- = the Earth 

-graphy = writing 

herb- = grass

hydro- = water; 

inter- = between 

limn- = a lake 

littor- = the seashore 

mutu- = reciprocal 

oligo- = small, scant 

pelag- = the sea 

-photo = light

therm- = heat 

thermo- = heat; 

troph- = food, nourishment 

-vora = eat