strengthening

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

"It is very important to give your daughter independence in her life so she learns from experience."

"I encouraged him during his race."

"to intensify a photographic negative"

"strengthen a muscle"

"My uncle ran in the city marathon last weekend. "

"It requires great strength to lift heavy objects."

"Go easy on him: he is but a child."

"a big strong man; Jake was tall and strong"

"The increase in homework assignments this week was significant. "

"strengthen a muscle"

"The teacher told us that the next exercise is to write an essay."