Common comparison markers include كَـ (“like”), كَأَنَّ (“as though”), and مِثْل (“similar to”). The kāf ordinarily precedes the term compared to, whereas kaʾanna presents a clause as a comparison. The marker changes the degree of explicitness.
«كَأَنَّ زَيْدًا أَسَدٌ»
It is as though Zayd were a lion.
The resemblance is explicitly marked. Removing the marker can intensify a statement, but distinguishing an emphatic simile from metaphor still requires examining grammar and context.