Pronunciation: [pˈɪk ˌʌp ˈɒn] (IPA) 
The phrase "pick up on" is spelled as it sounds, with each syllable corresponding to a specific sound. The first syllable, "pick," is pronounced with a short "i" sound and a hard "k" sound. The second syllable, "up," is pronounced with a short "u" sound and a soft "p" sound. The final syllable, "on," is pronounced with a short "o" sound and a nasal "n" sound. The IPA phonetic transcription for "pick up on" is /ˈpɪk ʌp ɒn/.
"Pick up on" is a phrasal verb that typically means to notice or perceive something, especially a subtle or indirect cue, remark, or signal. It implies the ability to pick up or detect information or hints that are not explicitly stated or obvious to others. When someone "picks up on" something, they interpret or understand it, often in a way that others might miss or overlook.
This phrase can be used in various contexts, such as in social situations, conversations, or observations. For example, if someone makes a sarcastic remark, a person who picks up on it quickly recognizes the humorous or mocking tone behind the words. Similarly, in a meeting or discussion, someone might pick up on nonverbal cues, such as body language or facial expressions, to understand another person's true thoughts or feelings.
"Pick up on" can also refer to the process of learning or acquiring new skills, knowledge, or information. It means to grasp or comprehend a subject or concept relatively quickly. For instance, a student might pick up on a complicated math concept after just one explanation, while others might take longer to understand it. In this sense, "pick up on" suggests a skill or ability to learn or absorb information rapidly.
In summary, "pick up on" is a phrasal verb meaning to notice, perceive, or understand something, either through observation or comprehension. It conveys the ability to detect or grasp subtle cues, remarks, or signals, as well as the quick acquisition of knowledge or skills.
