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bequeath [bequeath 词源字典]: bequeath: [OE] Etymologically, what you bequeath is what you ‘say’ you will leave someone in your will. The word comes from Old English becwethan, a derivative of cwethan ‘say’, whose past tense cwæth gives us quoth (it is no relation to quote, by the way). The original sense ‘say, utter’ died out in the 13th century, leaving the legal sense of ‘transferring by will’ (first recorded in 1066).

The noun derivative of Old English cwethan in compounds was -cwiss. Hence we can assume there was an Old English noun *becwiss, although none is recorded. The first we hear of it is at the beginning of the 14th century, when it had unaccountably had a t added to it, producing what we now know as bequest.
=> bequest, quoth[bequeath etymology, bequeath origin, 英语词源]
skate: skate: English has two words skate. The older is the fish-name [14], which was borrowed from Old Norse skata. Skate used for gliding over ice [17] comes from an Old French word for ‘stilt’ – eschasse. Its northern dialect form was escase. This was borrowed into English in the 16th century as the now obsolete scatch ‘stilt’, and into Middle Dutch as schaetse, its meaning unaccountably changed to ‘skate’.

Its modern Dutch descendant schaats was borrowed into English as scates, which soon came to be regarded as a plural, and was ‘singularized’ to skate. Eschasse itself came from a Frankish *skakkja, a derivative of the verb *skakan ‘run fast’, which in turn was descended from prehistoric Germanic *skakan (source of English shake).
=> shake
accountable (adj.): "answerable," literally "liable to be called to account," c. 1400 (mid-14c. in Anglo-French); see account (v.) + -able. Related: Accountably.
unaccountable (adj.): 1640s, "inexplicable," from un- (1) "not" + accountable. Meaning "not liable to be called to account" is recorded from 1640s. Related: Unaccountably; unaccountability; unaccountableness.