知之甚微

知 = 口 + 矢 : Mnemonic symbol: Francis Bacon is attributed to have stated "scientia potentia est", "knowledge is power". I'll thus represent 知 by Francis Bacon. Francis Bacon (知) and James II of England (zh) are playing darts (矢) in front of the space station (Ø1). Because they lack a dart board they just use a mandarin (口).

之 = 丶 + Z : Mnemonic symbol: Sooo sleepy... "zZz" (the character looks like a "Z"). James II of England (zh) fell asleep in front of the space station (Ø1). He sleeps on a big petal leaf (丶), making loud "zZz" (之) sounds.

甚 = 匹 + 甘 : Mnemonic symbol: An extremist.

Sherlock Holmes is in the middle of one of his adventures: in the encampment's bathroom he found an extremist threatening a cow. With his keen eyes though he sees that the extremist's bombing belt is fake and just made out of bolts of thread, so he bravely jumps in to rescue the frightened cow.

微 = 彳 + 山 + 一 + 几 + 攵 : Mnemonic symbol: a microscope.

Willy Walrus set up his microscope on a small table in front of the Eiffel Tower. He is investigating a very interesting crystal: the crystal looks like a big flute, and when he chips off pieces with a sledgehammer they also look like little flutes. He stores the chips in a black sneaker and to put them under the microscope he uses a fork.

微 = 彳 + 山 + 一 + 几 + 攵 : Mnemonic symbol: a microscope.

Willy Walrus set up his microscope on a small table in front of the Eiffel Tower. He is investigating a very interesting crystal: the crystal looks like a big flute, and when he chips off pieces with a sledgehammer they also look like little flutes. He stores the chips in a black sneaker and to put them under the microscope he uses a fork.