Frequentative -le, and crooked-eared owls

I love AlphaDictionary! Today Dr. Goodword taught me about a whole class of verbs I’d never heard of before. They’re known as “frequentative” verbs, and they are formed by adding -le or -er to an existing verb to indicate repetitive action (and sometimes, they’re formed off nouns to make them into verb forms). So “daze” becomes “dazzle,” “crack” becomes “crackle,” “spark” becomes “sparkle,” “nose” becomes “nuzzle,” “snug” becomes “snuggle.” I’ve been using the pattern to dig up all sorts of obsolete words (or verbs that were simply skipped over, coming to us only as the frequentative form). So far I’ve got sissen, the Middle English for “to hiss or buzz” and the root of “sizzle,” and cull or coll (also the root of “collar”) as the possible origin of “cuddle.” It’s an interesting look into the word-formation process. Here’s a list of a few more frequentative verbs.
And in keeping with the spirit of my category, have another new thing: some owls have crooked ears! No, they’re not deformed, or anything like that. It’s part of the unique set of tools they use to pinpoint invisible prey (such as a vole hidden under snow.) Instead of being set in parallel with one another, the way human ears are, one aperture is set higher than the other. This allows the owl to tell not only if a sound is coming from the left or right, but whether it is “up” or “down” in their current line of sight. By slightly shifting its head, an owl can pinpoint its next meal precisely, without ever seeing it!

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