(chemistry) soda ash (sodium carbonate)

chromatophore, a pigment-bearing cell.

(idiomatic) to remove obstacles in the way of one's objective

assistant / sub- / deputy / vice-

its / that / the said / such / aforementioned / the / this / same / he / she / you / that person / that thing / it / they

placement / set aside / put

coarse / rough / crude

on the verge of / on the brink of

If one learns without thinking, one will be lost in his learning. That is, if one does not think about what one learns, he will not arrive at the truth of it.

furniture; fixture; equipment; implement; apparatus; tackle; gear; paraphernalia; instrument / tool; utensil; appliance; device / means; medium; measure / property; possession; belongings; goods / ingredient; material; substance; stuff / style; manner; way; means / things; articles; goods; food; work; element / reality; actuality; state of affairs