perceptibly

the adverb "perceptibly" is built upon the core latin verb percipere, a compound of per- ('thoroughly') and capere ('to take, seize'). this literal sense of 'taking in thoroughly' evolved to mean 'to grasp with the mind' or 'to become aware of through the senses'. the adjective-forming suffix -ibilis was added to create "perceptible," meaning 'able to be taken in or grasped'. finally, the adverbial suffix -ly (from old english -lice) was appended, yielding the modern form that describes something done in a manner capable of being perceived.

Structure: percept (to perceive) + ibly (adverb suffix) - percept: from latin percept-, the past participial stem of percipere meaning 'to seize, understand'. - ibly: a suffix forming adverbs from adjectives ending in -ible, from latin -ibilis.