- Obsolete
adj. no longer used; rare or uncommon
Historians assumed record players would be obsolete by now, but in fact they're making a huge comeback.
- Modify
v. to change, alter, or tweak
Dr. Nguyen modified the gene so that it wouldn't carry the disease.
- Adapt
v. to make suit a new purpose v. to accommodate oneself to a new condition, setting, or situation
The US has adapted many foreign foods to better suit the tastes of Americans. Dogs are known for their ability to quickly adapt to their environments.