副詞 withal:

1. despite anything to the contrary (usually following a concession)
   同義詞：however, nevertheless, still, yet, all the same, even so, nonetheless, notwithstanding
2. together with this

with.al

adv.（副詞）
In addition; besides:
且，又，另外；此外：
例句：
.And, withal, a wider publicity was given to thought-provoking ideas.(Holbrook Jackson)
.而且，廣泛的公開性又給予了啟發(fā)人思考的觀念.(霍爾布魯克·杰克遜)

Despite that; nevertheless.
盡管，雖然；仍然
Archaic Therewith.
【古語(yǔ)】 與此，與之
prep.Archaic （介詞）【古語(yǔ)】
With. Used after its object at the end of a sentence or clause.
用，用以。用在句子或從句末尾其賓語(yǔ)之后

來(lái)源：
Middle English
中古英語(yǔ)
with [with] * see with
with [和，用] *參見 with
al [all] * see all
al [所有的] *參見 all