PERMEATORS Antonyms

• a structure or object that impedes free movement

• any condition that makes it difficult to make progress or to achieve an objective

• anything serving to maintain separation by obstructing vision or access

• a football player whose responsibility is to block players attempting to stop an offensive play

• a class of drugs that inhibit (block) some biological process

• a substance that retards or stops an activity

• someone who systematically obstructs some action that others want to take

• any structure that makes progress difficult

• One who, or that which, prevents.

• An arrangement, made with ropes and blocks, that prevents the boom of a sailing boat from performing a jibe.

• Any of various lines set up to reinforce or relieve ordinary running or standing rigging.

• a kind of sealing material that is used to form a hard coating on a porous surface (as a coat of paint or varnish used to size a surface)

• an official who affixes a seal to a document

• an act so striking or impressive that the show must be delayed until the audience quiets down

• a remark to which there is no polite conversational reply

• (bridge) a playing card with a value sufficiently high to insure taking a trick in a particular suit

• blockage consisting of an object designed to fill a hole tightly

• close or secure with or as if with a stopper