di·late (dī-lāt, dīlāt′)
v. di·lat·ed, di·lat·ing, di·lates
To make wider or larger; cause to expand.
1. To become wider or larger; expand.
2. To speak or write at great length on a subject; expatiate.
[Middle English dilaten, from Old French dilater, from Latin dīlātāre, to enlarge : dī-, dis-, apart; see DIS- + lātus, wide.]
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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:
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.