機械, 器械, きかい
1. machine, mechanism
often 器械
2. instrument, appliance, apparatus
血圧計が大切な検査器械です。
は
Particle, pronounced わ in modern Japanese
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
ただ, 只, 唯, 徒, 但, 常, タダ
May take 'no', Usually in kana
1. ordinary, common, usual
only 只
2. free of charge
usu. as ただでは...
3. unaffected, as is, safe
Adverb
4. only, merely, just, simply
Conjunction, esp. 但
5. but, however, nevertheless
かれは空威張りしてる、ただの香具師です。
直, ただ
NA-adjective, Adverb, Archaism
straight, direct
彼女はじきよくなるだろう。