soft: [OE] Soft goes back to a prehistoric West Germanic *samft-, which also produced German sanft ‘gentle, easy, smooth’ and Dutch zacht ‘soft’. It may go back ultimately to the prehistoric base *sōrn- ‘fitting, agreeable’, source of English seem and seemly. => seem, seemly
soft (adj.)
Old English softe, earlier sefte, "gentle, mild-natured; easeful, comfortable, calm, undisturbed; luxurious," from West Germanic *samfti, from Proto-Germanic *samftijaz "level, even, smooth, gentle, soft" (cognates: Old Saxon safti, Old High German semfti, German sanft; and from a variant form with -ch- for -f-, Middle Dutch sachte, Dutch zacht, German sacht), from root *som- "fitting, agreeable."
From c. 1200 of material things, "not stiff, not coarse, fine; yielding to weight." From late 14c. of wind, rain, etc. Of sounds, "quiet, not loud," from early 13c. Of words, "mild, restrained; courteous" mid-14c. From late 14c. as "indulgent," also "physically feeble; easily overcome, lacking manly courage." From 1755 of water ("relatively free from mineral salts"), from 1789 of coal. Meaning "foolish, simple, silly" is attested from 1620s; earlier "easily moved or swayed; soft-hearted, sympathetic; docile" (early 13c.). In reference to drinks, "non-alcoholic" from 1880. As an adverb, Old English softe "gently;" late 13c. as "quietly." As an interjection from 1540s.
Soft landing is from 1958 and the U.S. space program. Adjective soft-core (in reference to pornography) is from 1966 (see hardcore). Soft rock as a music style is attested from 1969. Soft sell is from 1955. Soft-shoe as a dancing style is attested from 1927. Soft-boiled is from 1757 of eggs; of persons, ideas, etc., 1930 (compare half-baked). Soft-focus (adj.) of camera shots is from 1917. The softer sex "women collectively" is from 1640s.
例文
1. In the background，in soft focus，we see his smiling wife.
背景部分には、妻が笑顔で覆っている映像が見えます。
2.Choose a soft ，medium or firm mattress to suit their individual needs.
それぞれのニーズに合わせて、柔らかくて、硬くてちょうど良い、または硬いマットレスを選びます。
3.The President could continue to bash Democrats as being soft on crime.
大統領は、民主党員の犯罪活動への慈悲を批判し続けるかもしれない。
4.She sighed,then continued in a soft ，calm voice.
彼女はため息をついた後、優しく穏やかな声で話し続けた。
5.I think more customers probably prefer a soft sell.