The Spanish verb 'solapar' (meaning 'to overlap' or 'to conceal') comes from combining the Latin prefix 'sub-' meaning 'under' with 'lappa' meaning 'stone slab or flat rock'. These elements first formed the noun 'solapa' (meaning 'lapel' or 'flap'), and then the verb was created by adding the Spanish infinitive suffix '-ar'.

The evolution of meaning is quite logical: the idea of one flat surface going under another (like stone slabs) developed into the concept of overlapping, as seen in clothing lapels, and eventually extended to the more general sense of concealment.

A closely related and simpler Spanish word is 'solapa', meaning 'lapel' or 'flap'. This noun is actually the base from which the verb 'solapar' was formed. When you see a lapel on a jacket, you can observe how one piece of fabric overlaps another - perfectly illustrating the connection between these related words.

While there aren't direct English cognates from the same Latin roots, English speakers can understand the concept through similar compound words using 'under-' (which corresponds to Latin 'sub-'). For example, 'underlap' and 'overlap' convey similar ideas to 'solapar'. The 'lap' in these English words, though from a different origin than Latin 'lappa', helps convey a similar concept of one thing lying over or under another.