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cleave 1 (klēv)
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v. cleft (klĕft) or cleaved or clove (klōv), cleft or cleaved or clo·ven (klōvən), cleav·ing, cleaves
v.tr.
1. To split with a sharp instrument. See Synonyms at tear1.
2. To make or accomplish by or as if by cutting: cleave a path through the ice.
3. To pierce or penetrate: The wings cleaved the foggy air.
4. Chemistry To split (a complex molecule) into simpler molecules.
v.intr.
1. To split or be capable or splitting, especially along a natural line of division: Certain brittle woods cleave easily.
2. To penetrate or pass through something, such as water or air.

[Middle English cleven, from Old English clēofan; see gleubh- in the Appendix of Indo-European roots.]

cleava·ble adj.

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2016 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 
cleave 2 (klēv)
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intr.v. cleaved, cleav·ing, cleaves
1. To adhere, cling, or stick fast.
2. To be faithful: cleave to one's principles.

[Middle English cleven, from Old English cleofian.]

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2016 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 

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