indefinable

"the heat of summer"

"the cans and cannots"

"My daughter's success in school is anything I'm proud of. "

"The baby was feeling the soft fur of the teddy bear. "

"The store is offering a special on school supplies this week. "

"My younger sister achieved good grades in her math class this semester. "

"I always try to express myself precisely."

"Her childhood memories of playing hide-and-seek with her siblings were happy and vivid. "

"The teacher's description of the new math concept helped the students understand it better. "

"He proved it with indescribable mathematics."

"the defining power of an optical instrument"

"The old photograph sparked a wave of nostalgia for her childhood home. "