Would you please recommend etymology dictionaries for English that MUST be available online (either for free or purchase), BUT subject to the following conditions?
1. Many of the recommendations in this Ask Metafilter post don't seem to be online.
2. If possible, the dictionary ought to trace back to and discusses the proto-language root
(ie Proto-Indo-European or Proto-Germanic).
I have already tried and used, and so please exclude:
3. the OED. It's either too brusque or fails to explain the connections between words.
4. Etymonline.com. It also sometimes fails to explain the connections between words.
5. Concise Oxford Dictionary of English Etymology; it's even brusquer than Etymonline.
In answer to user 'Robert' below, I exemplify a word unexplained fully by the resources above. Please do NOT answer to 'rogation' here (I can post anew if necessary); this thread is reserved for the content above the line separator.
OED fails to trace back far enough; it omits the PIE root. Etymonline does state the PIE root, but it doesn't connect or explain or reveal the (gaps in the) evolution of meanings.
rogare "to ask," ... "to stretch out (the hand) ...
PIE * rog-, 0-grade form of root * reg- "move in a straight line" (see regal) ...