Dictionaries for Learners of English as a Second Language:
Dictionary of Etymology and root words:
Online Etymology Dictionary-
This is a map of the original words in modern English.
Etymologies are not definitions;they’re explanations
of what our words meant and how they sounded 600 or 2,000 years ago.
Visual and Graphical Dictionaries:
Merriam-Webster Visual Dictionary Online
The Merriam-Webster Visual Dictionary Online is an interactive dictionary
showing not just definitions but as well as illustrations, charts,
pictures and more as they are developed by terminology experts.
Visuwords Online Graphical Dictionary-
Look up words to find their meanings and associations
with other words and concepts in a diagram.
Dictionary of Idioms:
Online Idiom Dictionary
Easy-to-use free idiom dictionary with over 5000 idioms and phrases explained.
Tagalog-Foreign Language Dictionaries: