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clap·board

(klăbərd, klăpbôrd′)

A long narrow board with one edge thicker than the other, overlapped horizontally to cover the outer walls of frame structures. Also called weatherboard.

tr.v. clap·board·ed, clap·board·ing, clap·boards

To cover with clapboards.

[Partial translation of Dutch klaphout : klappen, to split, crack + Middle Dutch holt, board.]

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clapboard

Indo-European & Semitic Roots Appendices

Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

Indo-European Roots

Semitic Roots

The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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