brooding

"My friend told me there was something in the box, but I didn't know what it was yet. "

"The young student is maturing into a thoughtful and responsible adult. "

"The midshipman stood at attention, eager to learn from the experienced captain. "

"an aggressive policy, war, person, nation"

"The plants gradually grew taller over the summer. "

"Condoms are designed to protect against sexually-transmitted diseases."

"the male species"

"Most thoughtful people eventually solve the puzzle."

"My sister, typically, wakes up early for school. "

"The upcoming school holiday is a welcome break for the students. "

"He was hoping that we would take him seriously."

"The reptile center is carefully incubating the turtle eggs to ensure they hatch successfully. "