Here are some examples of how "altered" can be used:
* The artist altered the painting by adding a new figure in the background. (The painting was changed, but the core elements remain the same.)
* Her mood was altered after receiving the bad news. (Her emotions changed, but she may still feel the same way about other things.)
* The architect altered the building plans to include a larger window. (The plans were changed, but the overall design may still be similar.)
Synonyms for "altered" include:
* Changed
* Modified
* Adjusted
* Amended
* Revised
* Transformed (implies a more significant change)
Antonyms for "altered" include:
* Unchanged
* Original
* Untouched
* Unmodified