Antonyms of verb thicken

2 of 3 senses of thicken

Sense 1
thicken, inspissate -- (make thick or thicker; "Thicken the sauce"; "inspissate the tar so that it becomes pitch")
       Antonym of thin (Sense 2)
      => thin -- (make thin or thinner; "Thin the solution")

Sense 2
thicken, inspissate -- (become thick or thicker; "The sauce thickened"; "The egg yolk will inspissate")
       Antonym of thin (Sense 1)
      => thin -- (lose thickness; become thin or thinner)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb thicken

3 senses of thicken

Sense 1
thicken, inspissate -- (make thick or thicker; "Thicken the sauce"; "inspissate the tar so that it becomes pitch")
       => change, alter, modify -- (cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue")

Sense 2
thicken, inspissate -- (become thick or thicker; "The sauce thickened"; "The egg yolk will inspissate")
       => change state, turn -- (undergo a transformation or a change of position or action; "We turned from Socialism to Capitalism"; "The people turned against the President when he stole the election")

Sense 3
thicken, inspissate -- (make viscous or dense; "thicken the sauce by adding flour")
       => change integrity -- (change in physical make-up)

Antonyms of adj thickened

3 senses of thickened

Sense 1
thickened -- (made or having become thick; "thickened bronchial arteries")

INDIRECT (VIA thick) -> thin -- (of relatively small extent from one surface to the opposite or in cross section; "thin wire"; "a thin chiffon blouse"; "a thin book"; "a thin layer of paint")

Sense 2
calloused, callous, thickened -- (having calluses; having skin made tough and thick through wear; "calloused skin"; "with a workman's callous hands")

INDIRECT (VIA tough) -> tender, untoughened -- (physically untoughened; "tender feet")

Sense 3
thickened -- (made thick in consistency; "flour-thickened gravy"; "dust-thickened saliva")

INDIRECT (VIA thick) -> thin -- (relatively thin in consistency or low in density; not viscous; "air is thin at high altitudes"; "a thin soup"; "skimmed milk is much thinner than whole milk"; "thin oil")

Similarity of adj thickened

3 senses of thickened

Sense 1
thickened -- (made or having become thick; "thickened bronchial arteries")
       => thick (vs. thin) -- (not thin; of a specific thickness or of relatively great extent from one surface to the opposite usually in the smallest of the three solid dimensions; "an inch thick"; "a thick board"; "a thick sandwich"; "spread a thick layer of butter"; "thick coating of dust"; "thick warm blankets")

Sense 2
calloused, callous, thickened -- (having calluses; having skin made tough and thick through wear; "calloused skin"; "with a workman's callous hands")
       => tough (vs. tender), toughened -- (physically toughened; "the tough bottoms of his feet")

Sense 3
thickened -- (made thick in consistency; "flour-thickened gravy"; "dust-thickened saliva")
       => thick (vs. thin) -- (relatively dense in consistency; "thick cream"; "thick soup"; "thick smoke"; "thick fog")