persist

"We usually have family dinner in the afternoon. "

"The child's first utterance was "Mama." "

"The student resolutely finished the difficult math problem. "

"Do you want me to continue to unload these?"

"My sister got a permanent for her wedding, which was supposed to last for several months. "

"He stubbornly refused to quit trying, even after failing 20 times."

"The teacher explained the lesson thoroughly throughout the entire class period. "

"A portion of your mortgage payment goes to reduce the principal, and the rest covers interest."

"Despite the difficult exam, the student persisted in studying hard. "

"The lemonade was a clear solution of lemon juice and water. "

"The complicated instructions on the new software difficult me from completing the project on time. "

"Even though it was difficult, she persisted in her studies until she graduated. "