noun:

• shaking; shake; jolt; jolting; vibration; tremor; flickering
• unsettledness; instability; vacillating; wavering
• existence of multiple spellings, pronunciations, usages, etc. for a single word - Linguistics term

noun:

• a move (in go, shogi, etc.)
• only way; only means
• doing alone; dong single-handed; monopoly ➜ 一手に

noun:

• one long cylindrical thing; one film, TV show, etc.; one goal, home run, etc.; one telephone call ➜ 本【ほん】
• one version
• one book; a certain book
• ippon; one point; a blow - Martial Arts term
• experienced geisha ➜ 半玉【はんぎょく】

suffix noun:

• single-minded focus on ... - after a noun, usu. as 〜一本で, 〜一本に, etc.