retardant

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

"The combination of soft music and warm lighting created a relaxing atmosphere in the living room. "

"The firemen sprayed the house."

"The teacher explained the new math concept quickly. "

"The wildfire destroyed many trees in the forest. "

"The restaurant is serving delicious pasta tonight. "

"Whose serve is it?"

"He spread his newspaper on the table."

"The construction project suffered a significant retard due to the unexpected heavy rains. "

"The student's action of studying diligently improved her grades. "

"The scientist studied the chemical composition of the soil sample. "

"The firefighter bravely entered the burning building to rescue the people inside. "