chair
椅 centers on a chair: a piece of furniture for sitting, typically made of wood.
椅 combines 木 (tree/wood) with 奇, which likely contributes the sound イ. The character originally referred to a type of tree, later extended to mean a wooden chair.
The left side is wood 木, and the right side 奇 looks like a strange, tall structure. Picture a wooden chair with an oddly tall back: 椅 is a chair.
For イ, imagine an eagle (イーグル) perched on a wooden chair: eagle -> イ, and the bird sits on the chair.
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chair; seat; stool; bench
wheelchair
couch; bench; ottoman; settee
easy chair; armchair
high chair
folding chair; collapsible chair
reclining chair
shower stool with a u-shaped hole in the middle
folding chair (with tubular metal frame)
three-legged stool
stool
swivel chair
children's chair; kids' chair
armchair detective
sofa; couch; lounge chair
small chair
legless chair (used in a room with tatami flooring)
rocking chair; rocker
musical chairs
chair seating (as opposed to sitting on the floor); chair seat