HOW CROWD CONTROL WORKS

Rules the in-game skill descriptions do not tell you. The table follows the official crowd-control wording; how it applies to each hero is in the Mechanics section of their page.

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Control	Level	Interrupts skills	Through immunity	Purify removes	Arlott Gaze	Benedetta parry
Disarm	low	no	—	—	—	—
Restrain	low	no	no	yes	no	no
Root	low	no	yes	yes	no	no
Immobilize	low	no	no	yes	yes	yes
Silence	basic	some; not most channels	no	yes	no	no
Stun	basic	some; not most channels	no	yes	yes	yes
Fear	basic	some; not most channels	no	yes	yes	yes
Taunt	basic	some; not most channels	no	yes	yes	yes
Airborne	high	most, except skills with control immunity	no	yes	yes	yes
Freeze	high	most, except skills with control immunity	no	yes	yes	yes
Petrify	high	most, except skills with control immunity	no	yes	yes	yes
Transform	high	most, except skills with control immunity	no	yes	yes	yes
Frozen Moment	ultimate	no — freezes, but does not cancel what is in progress	yes	no	yes	no
Suppression	ultimate	yes — most skills and dashes	yes	no	yes	yes

KEY RULES

Purify removes all debuffs and gives 1.2 seconds of control immunity and +15% movement speed. It neither removes nor blocks suppression, nor the roots of Minsitthar's royal guards.
Restrain (Kaja's cage, Silvanna's circle) is low-level: it does not interrupt skills, the target can still cast, but cannot leave the area — no dash, no rewind. Kaja's cage can only be escaped before it locks: dash, blink or Purify pressed in time.
Suppression (Franco, Barats) and Frozen Moment (Marcel) go through control immunity and cannot be removed.
Frozen Moment freezes but does not cancel skills, dashes or blinks already in progress. Since patch 2.2.16 Marcel interrupts location-targeted skills, such as Eudora's ultimate.
Silence does not interrupt most channelled skills — it only stops them from starting.
Airborne interrupts most skills, but not those that grant control immunity.
Root and immobilize stop dashes, blinks and Flicker, but not regular skills.
Flicker does not interrupt the cast animation of most skills — you can use it mid-cast.
Invulnerability and control immunity only save you from Kaja's cage if they are active before it locks.

DISPUTED POINTS

Two tables on the same wiki page contradict each other: the summary table says Frozen Moment interrupts skills and suppression does not. The in-game wording says the opposite, confirmed by dozens of skills marked 'only interrupted by suppression' — Saber, Aldous, Johnson, Ixia. The in-game wording is right.
The wiki says Flicker counts as a blink and is 'therefore unaffected by Khufra's bouncing ball', while the ball itself knocks up anyone who blinks across Khufra. The statement contradicts itself — test it in game.