This velvety word rolls off the tongue, and it has two different meanings, each having a subtle difference. On one hand it means tangible, or capable of being sensed or touched. On the other hand, it simply means perceptible or noticeable.
Example: The firm’s extreme stress level was palpable even to the janitorial service personnel. If they didn’t meet the Friday afternoon deadline for the new hotel bid package, then the development company – their only current client – was sure to fire them come Monday.