Cleave

Did you know that the word cleave, in the English language, acts as a verb with two entirely opposite meaning? It means both to divide and to bind at the same time. An excerpt from the website dictionary.com:

cleave

1
–verb (used without object)

1.	to adhere closely; stick; cling (usually fol. by to).

2.	to remain faithful (usually fol. by to): to cleave to one's principles in spite of persecution.

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Origin:
bef. 900; ME cleven, OE cleofian, c. OHG klebēn (G kleben)

cleave

2

–verb (used with object)

1.	to split or divide by or as if by a cutting blow, esp. along a natural line of division, as the grain of wood.

2.	to make by or as if by cutting: to cleave a path through the wilderness.

3.	to penetrate or pass through (air, water, etc.): The bow of the boat cleaved the water cleanly.

4.	to cut off; sever: to cleave a branch from a tree.

–verb (used without object)

5.	to part or split, esp. along a natural line of division.

6.	to penetrate or advance by or as if by cutting (usually fol. by through).

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Origin:
bef. 950; ME cleven, OE clēofan, c. OHG klioban (G klieben), ON kljūfa; akin to Gk glýphein to carve, L glūbere to peel

Interesting.