primordial

"communication of a secret"

"The primordium of the student's future career was their early interest in coding. "

"My teacher explained the new math concept, and I understood it perfectly. "

"The development of this story has been slow."

"The single-celled organism was studied by the biology students in their science class. "

"The characteristic smell of freshly baked bread always reminds me of my grandmother's kitchen. "

"This manuscript is the original."

"at eleven, we went for an early lunch;  she began reading at an early age;  his mother suffered an early death"

"a successful use of medicine;  a successful experiment;  a successful enterprise"

"Letters are the elements of written language."

"We need some sort of principles to reason from."

"The scientist studied the effects of different types of soil on plant growth. "